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

<passage>:
"Never mind that," Kelly said, escorting Dan along the corridor. He such a target, the thieves were bound to show up. If Dan sat in the vault—day and night—waiting—he would see for himself how they operated. Dan liked it. Still, it hardly seemed worth all the effort.... he'd have to handle everything just right. If he scared them off there'd be no second chance. He would have lost his crack at—whatever his discovery might mean to him. Dan was aware of his heart thumping painfully under his ribs. His mouth was dry. This was the moment he'd been planning for, but now that it Dan, sitting rigid on the cot. The thin man placed a lantern on the table, twiddled a knob. A warm light sprang up. The visitors looked at It appeared Kelly hedged his bets. "Mr. Kelly, I can explain everything!" Dan called. He turned back to Fiorello. "Listen, I figured out—" "Look—I want to go with you!" Dan shouted. "You can't go, my dear fellow," Fiorello said. "Room for two, no more." Dan whirled to the cot, grabbed up the pistol Kelly had supplied. He aimed it at Manny. "You stay here, Manny! I'm going with Fiorello in the cage beside Fiorello. "We'll send for you," Dan said. "Let's go, Fiorello." The balding man snatched suddenly for the gun. Dan wrestled with him. The pistol fell, bounced on the floor of the cage, skidded into the "Manny!" Fiorello released his grip on Dan, lunged to aid his heels. Dan clung to the framework as Fiorello grappled with Kelly. A cop pushed past them, spotted Dan, moved in briskly for the pinch. Dan grabbed a lever at random and pulled. hard. He'd take it slowly, figure out the controls.... Dan took a deep breath and tried another lever. The cage rose gently, Cautiously he neutralized the control lever. The cage came to rest an inch above the floor. As far as Dan could tell, he hadn't traveled so much as a minute into the past or future. worked. So far he had only found the controls for maneuvering in the usual three dimensions, but the time switch was bound to be here somewhere.... another second she would see him, and give the alarm—and Dan needed a few moments of peace and quiet in which to figure out the controls. He moved a lever. The cage drifted smoothly sideways, sliced through the wall with a flurry of vivid blue light. Dan pushed the lever Dan blinked at the flash of blue and looked down. He was hovering twenty feet above a clipped lawn. He looked at the levers. Wasn't it the first one in line that moved the seemed to suddenly become aware of eyes on her, whirled— With a sudden lurch that threw Dan against the steel bars, the cage shot through the wall into the open air and hurtled off with an acceleration that kept him pinned, helpless. He groped for the cage, the machine braked, shot through the wall and slammed to a stop. Dan sank to the floor of the cage, breathing hard. There was a loud click! and the glow faded. With a lunge, Dan scrambled out of the cage. He stood looking around at a simple brown-painted office, dimly lit by sunlight filtered through "How ... what...?" "The carrier returns here automatically when the charge drops below a critical value," the voice said. "A necessary measure to discourage big ideas on the part of wisenheimers in my employ. May I ask how you happen to be aboard the carrier, by the way?" "I just wanted—I mean, after I figured out—that is, the police ... I went for help," Dan finished lamely. "Help? Out of the picture, unfortunately. One must maintain one's "I hope you're not thinking of leaving suddenly," the beachball said, following Dan's glance. One of the eighteen fingers touched a six-inch yellow cylinder lying on the desk. "Until the carrier is fueled, I'm afraid it's quite useless. But, to put you in the picture, I'd best "That won't be necessary, Dan," Blote said. "I'll accompany you." He large." He went to his desk, rummaged, came up with a handful of fuel cells. "Now, off to gather in the time machine." He took his place in the carrier, patted the seat beside him with a wide hand. "Come, Dan. Get a wiggle on." Hesitantly, Dan moved to the carrier. The bluff was all right up to a point—but the point had just about been reached. He took his seat. Blote moved a lever. The familiar blue glow sprang up. "Kindly direct "I don't know the town very well," Dan said, "but Maple's over that way." Blote worked levers. The carrier shot out into a ghostly afternoon sky. Faint outlines of buildings, like faded negatives, spread below. Dan smoothly toward the flat roof Dan indicated. "Better let me take over now," Dan suggested. "I want to be sure to get us to the right place." "Very well, Dan." Dan dropped the carrier through the roof, passed down through a dimly seen office. Blote twiddled a small knob. The scene around the cage grew even fainter. "Best we remain unnoticed," he explained. The cage descended steadily. Dan peered out, searching for identifying employ a bar-type construction, not unlike our carriers." the machine veered left, flickered through a barred door, came to a halt. Two nebulous figures loomed beside the cage. Dan cut the switch. If he'd guessed wrong— "Grab him!" someone yelled. Blote recoiled, threshing his ambulatory members in a fruitless attempt to regain the carrier as Manny and Fiorello closed in. Dan hauled at a lever. He caught a last glimpse of three struggling, blue-lit figures as the carrier shot away through the cell wall. III Dan slumped back against the seat with a sigh. Now that he was in the clear, he would have to decide on his next move—fast. There was no telling what other resources Blote might have. He would have to hide the carrier, then— A low growling was coming from somewhere, rising in pitch and volume. Dan sat up, alarmed. This was no time for a malfunction. The sound rose higher, into a penetrating wail. There was no sign of mechanical trouble. The carrier glided on, swooping now over a nebulous landscape of trees and houses. Dan covered his ears against the deafening shriek, like all the police sirens in town blaring at once. If the carrier stopped it would be a long fall from here. Dan worked the controls, dropping toward the distant earth. The noise seemed to lessen, descending the scale. Dan slowed, brought the carrier in to the corner of a wide park. He dropped the last few inches and cut the switch. As the glow died, the siren faded into silence. Dan stepped from the carrier and looked around. Whatever the noise was, it hadn't attracted any attention from the scattered pedestrians in the park. Perhaps it was some sort of burglar alarm. But if so, why hadn't it gone into action earlier? Dan took a deep breath. Sound or no sound, he would have to get back into the carrier and transfer it to a secluded spot where he could study it at leisure. He stepped back in, reached for the controls— like a flashbulb exploding. Dan stared from the seat at an iridescent rectangle which hung suspended near the carrier. Its surface rippled, faded to blankness. In a swirl of frosty air, a tall figure dressed in a

<question>:
Why would Dan have wanted Fiorello to accompany him on the carrier?

<options>:
A Dan would have been able accomplish his goal of meeting Blote faster.
B Fiorello would have taught Dan how to time-travel.
C Dan purposely wanted to leave Manny behind.
D It would have prevented the trouble Dan had with controlling the carrier.

<answer>:

D