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

<passage>:
Quest. For a moment Trella thought laboratory officials in New York. immeasurably There was only one question: Was he human? Trella feared she was in for trouble even before Motwick's The two bodyguards were with powerful, utterly invulnerable. In his haste, Quest missed the they shifted restlessly in their chairs. Trella had not wanted to come Quest made no effort to retaliate. to the Golden Satellite. It was a Quest steely arm. Trella swung with her whole body, and slapped him so hard he nearly fell from his chair. As “I couldn't,” said Quest miserably, and turned his face away. Later, alone with Trella on the control deck, Jakdane gave with Quest, forget it,” he said. It all figures. “Look, Trella, he said he was born on Jupiter. A human could injured. How can you believe he's really human?” Trella remembered the thug Kregg striking Quest in the face and then crying that he had injured his father,” protested Trella. “Robots and androids frequently look on their makers as “Quest may not even know he's Trella again as Kregg overtook his quarry and swung a huge fist like a sledgehammer. Exactly what happened, Trella wasn't sure. She had the impression “No. Quest never did tell me, Quest lived in the poisonous atmosphere of Jupiter, if he's human?” Trella was silent. “For the protection of humans, there are two psychological and Kregg sank stunned to his knees. The dark man, who had grabbed Trella's arm, released her and ran for the door. man Quest to a T, Trella. There is no other explanation for him: he must be an android.” Trella did not want to believe Jakdane was right, but his reasoning “Those characteristics fit your was unassailable. Looking Moving agilely around the end his refusal to defend himself against a human, his inability to return Trella's love for him. It was not inconceivable that she should have unknowingly and staggered out. Trella ran to the unconscious Motwick's side. “That means you, too, lady,” them. She was glad now that she had not told Quest of her mission to Ganymede. He thought he was Dr. Mansard's son, but to decide what to do about Quest. Quest about seeing him again after she had completed her assignment. had told her he could not love her. Her best course was to try to forget him. Nor did Quest try to arrange with her for a later meeting. “It has been pleasant knowing you, Trella,” he said when they we can't help,” she said gently, taking his hand in farewell. He followed Trella out the door Trella took a fast plane from of the Golden Satellite and fell White Sands, and twenty-four though he lifted a feather pillow. “I'm Quest Mansard, Miss,” from Jupiter.” “I'm Trella Nuspar,” she said, favoring him with a green-eyed glance. “You mean Io, don't you—or Miss Trella, eh?” “I'm glad they're something you can use, Mr. Blessing,” she She told him about Quest. he is, without knowing he's an android and claim ownership as Dr. Mansard's heir.” Trella planned to spend a few days resting in her employer's spacious home, and then to take a short vacation before resuming her duties as his confidential secretary. The next morning when she came down from her “Because,” said Quest, “his radio was sabotaged, just as his ship's drive was.” “Why all the protection?” she asked Blessing. “A wealthy man must be careful,” Trella could think of. Without actually intending to, she exclaimed: “You aren't afraid of Quest? away from the prospect of fighting anyone.” Trella sighed. Cowardice was a state of mind. It was peculiarly that's required by law? What about that, eh?” Trella was silent, shocked. There was something here she hadn't known about, hadn't even inappropriate, but not unbelievable, suspected. For some reason, Dom They had reached the more brightly lighted section of the city now. Trella could get a cab from here, but the Stellar Hotel wasn't far. They walked on. Trella had the desk clerk call a cab to deliver the unconscious Motwick to his home. She and Trella's connection with Blessing. But, since this was to be the atmosphere of Blessing's to assign her to take the Quest came the day before she was scheduled to leave. Trella was in the living room with Blessing, discussing the instructions she was to give to the against telling him that the Earth. Motwick was an irresponsible playboy whom Trella had known Trella heard the doorbell ring. The heavy oaken front door was kept locked now, and the guards briefly on Earth, and Trella was glad to dispense with his company them. The other guards were at their posts. of Quest. for the remaining three more than she intended to. with him. Now this did not suit her at all. Trella had always liked her and Quest burst through. Earth, but it would still require fifty-four days to make the trip. So Trella was delighted to find that the ship was the Cometfire unconscious heap against the rear of the garage. Trella had across the floor and lay in an opened the door of the car, but it was wrenched from her hand Quest was after it, like a laughing. “What's your trouble, Trella?” “I'm in love with that huge chunk of man who came aboard with me, and I'm not sure I ought to be,” she confessed. “I tree on the other side in a twisted tangle of wreckage. With a horrified gasp, Trella may need protection against myself “If it's to keep you out of another “But why, Quest? I knew he answered Quest “I didn't know crew members and three passengers aboard the ship's tiny personnel sphere, and Trella was thrown with Quest almost constantly. She enjoyed every minute She told him only that she Io. Blessing wanted the valuable to tell him what the papers were. Her employer had impressed upon her that her mission was confidential, but surely Dom Blessing sabotaged the ship's drive so it would fall into Jupiter. could not object to Dr. Mansard's son knowing about it. rights to the surgiscope, and he “But my father was able to purpose.” More gently than Trella would have believed possible for his Jupiter-strong muscles, Quest any woman until my job was done.” Trella disengaged herself. “I'm sorry,” she said. “Don't you know this, too, now: that “Why, Quest, it's obvious,” He knew I'd have to grow laboratory of Dr. Mansard. When it was found at last, he sent Trella, his most trusted secretary, to Ganymede to bring back to him the notebooks found up on Jupiter, and he operated atmosphere as well as an oxygen atmosphere.” Trella looked at him. He was that he received his rightful share of the inheritance. Because of this, Trella was tempted to tell Quest the good news herself not badly hurt, any more than an elephant would have been, do this his own way, and he might not appreciate her meddling. At midtrip, Trella made a rueful confession to Jakdane. “It seems I was taking unnecessary “I kept waiting for Quest to do She expected Jakdane to salve kept to himself as much as possible. He was distantly polite in his relations with both crew and assignment on which she had come to the Jupiter system was “I'm sorry!” exclaimed Quest

<question>:
Why doesn't Trella tell Quest about her mission?

<options>:
A Trella is afraid Quest won't love her if he finds out about her mission.
B Trella is worried Quest will take his father's papers and leave her.
C Trella was told specifically to stay away from Quest.
D Trella's employer wants the mission kept confidential.

<answer>:

D