Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
THE GIRL IN HIS MIND Every man's mind is a universe with countless places in which he can hide—even from himself! The dance that the chocoletto girl was performing was an expurgated it was still on the lascivious side. The G-string that constituted the chocoletto girl's entire costume put her but one degree above the nakedness which the original dance demanded. Nathan Blake's voice was Blake resumed watching. The girl's movements were a delicate blend of lived up to it completely. She was beautiful too. Her high-cheekboned face was striking—the eyes dark-brown and wide-apart, the mouth sensuous, the teeth showing in a on the outside, and gave a false impression of poverty. He expected to find the usual hanger-on waiting in the anteroom, and looked forward to booting him out into the alley. Instead he found a young girl— A human girl. Five years as a roving psycheye had hardened Blake to commercial "How old are you?" Blake asked. flamed in Blake's cheeks, and for a moment he considered leaving In sleep, a strand of her copper-colored hair had tumbled down across her forehead and lay like a lovely flower upon the virginal whiteness of her skin. There was something saintly about her quiet face. notoriously steep. Blake was breathing hard when he reached the crest. materialization, and his quarry's footprints stood out clearly in the duplicated sand. Sabrina York did not even know the rudiments of the art of throwing off a mind-tracker. It would have done her but little good if she had, for twelve years as a psycheye had taught Blake all the tricks. in her tracker's mind was in itself a sufficient guarantee of her safety. After all, she had no way of knowing that he had discovered her where Blake had lived at a much later date. In reality, the places were Sabrina's footsteps led up to the front door, and the door itself was ajar. Perhaps she was still inside. Perhaps she was watching him even Blake. At Blake's entry he went right on smoking and watching as though that constituted Blake's mind-world ceased to be. Ironically, he was crash several years ago—and for a long while Blake did not move. but he knew it would do no good. For her he had no reality, not only because he was far in her future, but because in his mind-world she was a mortal and he, a god—a picayune god, perhaps, but a real one. closer so that he could see them more clearly. No, he had made no mistake: the first word was "Sabrina", and the second was "York". He stepped back. Odd that a kitchen range should have the same name as his quarry. But perhaps not unduly so. Giving appliances human names had been common practice for centuries. Even a name like "Sabrina York", while certainly not run-of-the-mill, was bound to be duplicated in real life. Nevertheless a feeling of uneasiness accompanied him when he left the kitchen and climbed the stairs to the second floor. He went through each room systematically, but saw no sign of Sabrina York. He lingered for some time in his own room, wistfully watching his fifteen-year-old self lolling on the bed with a dog-eared copy of to match. He gasped. It simply hadn't occurred to him that his pursuers actually had an impulse to flee. He controlled it and descended the stairs with exaggerated slowness, leaving the house by way of the back door. He picked up Sabrina's trail Not the campus of the university which he had visited two days ago to attend his protegee's graduation. It was not a place-time that he cared to revisit, nor a moment that he cared to relive, but Sabrina's trail led straight across the artificially stunted grass toward the little bench where he and Deirdre Eldoria had come to talk after the ceremony The bench stood beneath a towering American elm whose feathery branches traced green arabesques against the blue June sky. A set of footprints slightly deeper than its predecessors indicated that Sabrina had paused by the trunk. Despite himself Blake paused there too. Pain tightened his throat when he looked at Deirdre's delicate profile and copper-colored hair, intensified when he lowered his eyes to the had given her as a graduation present, and which she had proudly pinned upon her bodice for the whole wide world to see, made him want to "Please," Blake Past said, desperation deepening his voice. "You're Blake Past stood up too. "No, not yet. I'll walk back to the sorority Blake Present watched them set out side by side toward the remembered register on Blake Past's mind, they did not exist for Blake Present. All that existed for Blake Present were the diminishing figures of the His first reaction when he faced them was amazement. His next reaction was shock. His third was fear. His amazement resulted from recognition. One of the three women arrayed blond and chic Vera Velvetskin, whose picture he had seen on box after countless box of his mother's favorite detergent. His shock resulted from the expressions on the three faces. Neither Officer Finch disliked him, though. They hated him. They hated him so much that their hatred had thinned out their faces and darkened their eyes. More shocking yet, Vera Velvetskin, who had never existed save in some copywriter's mind, hated him too. In fact, judging from the greater thinness of her face and the more pronounced darkness of her eyes, she hated him even more than Miss Stoddart and Officer Finch did. His fear resulted from the realization that his mind-world contained Blake stared at them open-mouthed. Then he turned and fled. Blake was one of a long line of such operators. So far as he knew, the present case represented the first time a criminal had ever hidden out in the pursuer's mind. It would have been a superb stratagem indeed if, shortly after her entry, Sabrina York had not betrayed her presence. For her point of entry she had used the place-time materialization of the little office Blake had opened hadn't constituted a sentimental memory. Whenever Blake accepted a case He had suspected the truth immediately, and when he had seen the was hiding out in his mind. Retiring to his bachelor quarters, he had entered at the same place-time and set off in pursuit. Her only advantage lost, Sabrina York was now at his mercy. Unless she discovered his presence and was able to locate his most recently materialized place-time before he over-took her, her capture was Only two things bothered Blake. The little office was far in his past, and it was unlikely that anyone save the few intimate acquaintances whom he had told about it were aware that it had ever existed. How, then, had a total stranger such as Sabrina York learned enough about it to enable her to use it as a point of entry? The other thing that bothered him was of a much more urgent nature. beings considerably higher on the scale of mind-country evolution than ordinary memory-ghosts. One woman whom he had apprehended in her own mind had created a walking-talking Virgin Mary who watched over her wherever she went. And once, after tracking down an ex-enlisted that Blake was less well-adjusted than he considered himself to be, why had he created three such malevolent super-images as Miss Stoddart, Officer Finch, and Vera Velvetskin? enough, it was Burns's birthplace that had impressed Blake most. Now the little cottage stood out in much more vivid detail than any of the other famous dwellings. Sabrina York must have been attracted to the place, for her footprints showed that she had turned in at the gate, walked up the little path and let herself in the door. reason for Blake to linger. As a matter of fact, the fascination that fascination, and Blake not only lingered but went inside as well.

<question>:
What caused Blake to suspect where Sabrina was?

<options>:
A Many criminals had entered his mind before
B He saw his office in disarray
C He saw an embroidered handkerchief
D Sabrina was a total stranger

<answer>:

B