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 order. Dan opened the refrigerator, looked over the stock of salami, well-filled sandwich, keyed open a can of beer. It wasn't fancy, but it would do. Phase one of the plan had gone off without a hitch. Basically, his idea was simple. Art collections had been disappearing from closely guarded galleries and homes all over the world. It was 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. his way to the bunk. So far, so good, he reflected, stretching out. When they showed up, 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. But he was ready. Let them come. Eight hours, three sandwiches and six beers later, Dan roused suddenly Dan was aware of his heart thumping painfully under his ribs. His mouth Dan, sitting rigid on the cot. The thin man placed a lantern on the "Wait a minute," Dan said. "Before you do anything hasty—" "Wait a minute!" Dan shouted. "I'd like to make a deal with you fellows." us." "Can't be helped." "Look—I want to go with you!" Dan shouted. "I'll bet you do!" Kelly's voice roared. "One more minute and I'll have 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 time machine." "Are you nuts?" Manny demanded. "I'm flattered, dear boy," Fiorello said, "but—" "You can't leave me here!" Manny spluttered, watching Dan crowd into The balding man snatched suddenly for the gun. Dan wrestled with him. "Manny!" Fiorello released his grip on Dan, lunged to aid his cop pushed past them, spotted Dan, moved in briskly for the pinch. Dan swallowed hard and nudged a second lever. The cage sank like an elevator into the floor, vivid blue washing up its sides. Hastily he reversed the control. Operating a time machine was tricky business. One little slip, and the Slane molecules would be squeezing in among brick and mortar particles.... But this was no time to be cautious. Things hadn't turned out just the way he'd planned, but after all, this was what he'd wanted—in a way. The time machine was his to command. And if he gave up now and crawled back into the vault, Kelly would gather him in and pin every art theft of the past decade on him. It couldn't be too hard. He'd take it slowly, figure out the controls.... Dan took a deep breath and tried another lever. The cage rose gently, in eerie silence. It reached the ceiling and kept going. Dan gritted waddled to a luminous refrigerator, caught sight of Dan rising slowly much as a minute into the past or future. He looked over the controls. There should be one labeled "Forward" something thrown together hastily from common materials. Still, it 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. With a sudden lurch that threw Dan against the steel bars, the With a lunge, Dan scrambled out of the cage. He stood looking around at "That reminds me," Dan said. "I have to be running along now." He picture, a vacancy exists on my staff, which you might well fill. How does that grab you?" "You mean you want me to take over operating the time machine?" "Time machine?" The brown eyes blinked alternately. "I fear some confusion exists. I don't quite dig the significance of the term." "That thing," Dan jabbed a thumb toward the cage. "The machine I came here in. You want me—" "Time machine," the voice repeated. "Some sort of chronometer, perhaps?" "Huh?" "I pride myself on my command of the local idiom, yet I confess the The beachball head leaned forward interestedly. "Clue me, Dan. What's a time machine?" "Well, it's what you use to travel through time." The brown eyes blinked in agitated alternation. "Apparently I've loused up my investigation of the local cultural background. I had no idea the wide mouth opening and closing rapidly. "And to think I've been spinning my wheels collecting primitive 2-D art!" "But—don't you have a time machine? I mean, isn't that one?" "That? That's merely a carrier. Now tell me more about your time machines. A fascinating concept! My superiors will be delighted at much too far to jump. Maybe he could reach the machine and try a getaway— "I hope you're not thinking of leaving suddenly," the beachball said, "But the way Manny and Fiorello came sailing in through the wall! That has to be a time machine they were riding in. Nothing else could just materialize out of thin air like that." "You seem to have a time-machine fixation, Dan," Blote said. "You shouldn't assume, just because you people have developed time travel, that everyone has. Now—" Blote's voice sank to a bass whisper—"I'll make a deal with you, Dan. You'll secure a small time machine in good condition for me. And in return—" " supposed to supply you with a time machine?" Blote waggled a stubby forefinger at Dan. "I dislike pointing it out, Dan, but you are in a rather awkward position at the moment. Illegal with an abundance of the local medium of exchange. Equitable enough, I should say. What about it, Dan?" "Ah, let me see," Dan temporized. "Time machine. Time machine—" "Don't attempt to weasel on me, Dan," Blote rumbled ominously. "I'd better look in the phone book," Dan suggested. Silently, Blote produced a dog-eared directory. Dan opened it. "Time, time. Let's see...." He brightened. "Time, Incorporated local "Both," Dan said. "I'll just nip over and—" it. Still, a ripe nut can fall from a small tree as well as from a 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." The cage descended steadily. Dan peered out, searching for identifying employ a bar-type construction, not unlike our carriers." "That's right," Dan said, staring through the haziness. "This is where they do time...." He tugged at a lever suddenly the machine veered figures loomed beside the cage. Dan cut the switch. If he'd guessed to regain the carrier as Manny and Fiorello closed in. Dan hauled at a 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 Dan sat up, alarmed. This was no time for a malfunction. The noise seemed to lessen, descending the scale. Dan slowed, brought Dan stepped from the carrier and looked around. Whatever the noise hadn't it gone into action earlier? Dan took a deep breath. Sound or no secluded spot where he could study it at leisure. He stepped back in, reached for the controls—

<question>:
Why was Dan determined to wait so long for the thieves?

<options>:
A He wanted to steal the carrier so the thieves could not leave.
B He planned to help Kelly successfully arrest the thieves.
C He wanted to help prevent important paintings from being stolen out of the vault.
D It was his plan to have the chance to time-travel.

<answer>:

D