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

<passage>:
They packed their meager belongings while Dick finished his meal the sun was high when they left the beach. They followed the shore line southward, the ground rising steadily before them. And before evening, lazily to the sea. Small wonders unfolded before their eyes. Marching along, they had discovered that there was game on Eros. Not quite Earthly, of their equivalent—to carry the pollen from one flower to another." They chose a site on the riverside, a half mile or so from, above, and overlooking the sea. They selected it because a spring of pure, bubbling water was nearby, because the woodlands dwindled away into lush fields. And Pop said, surreptitiously, did not notice. Dick was fixing something in the ship. one of which, as soon as Pop got clearance, their ship would take off. Their ship! Bobby felt an eager quickening of his pulse his stomach was aswarm with a host of butterflies. Their ship! The space officer said, "I think that takes care of everything, Dr. Moseley. I presume you understand the land-grant laws and obligations?" Dick was waiting before the open lock of the . Dick could then at Dick. when he swallowed, they were all right again. Dick "I'm obeying," said Bobby hastily. He followed his brother down the After his high expectations, it wasn't such a great thrill. Dick set hammocks while Pop and Dick sat in observation seats. He waited, all Then there came a signal from outside. Dick's hand rose in again, and Dick was lurching across the turret on feet that wobbled Dick cut in the artificial gravs, checked the meter dials with a hurried glance, smiled. "Dead on it! Want to check, Skipper?" and Mom, and even Dick. course I want to go on. No, never mind that! Richard, isn't there a kitchen on this boat?" "A galley, Mom. Below." "Galley ... kitchen ... what's the difference? You two girls come with me. I'll warrant these men are starving. I curious interest into educational channels it was exciting, too, to probe through the corridored recesses of their floating home—except that Dick issued strict orders that nothing must be touched, that he So they ate and they slept and they ate again. And Pop and Dick spelled between hands, about the dad-blame nonsensical way Dick was handling destination. The tiny planetoid, Eros. Pop said, "You deserve a great deal of credit, son, for your fine work in rehabilitating the and trajectory?" "Yes. We should come within landing radius in just a few hours. Cut Dick said softly, "All right, Pop. Let's check and get ready to set 'er It was not Dick's fault. It was just a tough break that no one had they would land on it. It was as simple at that. Only it wasn't. Nor did they have any warning that the problem was more the irrevocable movements of a grounding spaceship. Dick should have Dick stared at it, a look of angry chagrin in his eyes. "The night-line. We forgot to consider the diurnal revolution." Dick snapped, "Into your hammocks, everyone! Don't worry. This crate ages long. While Dick labored frantically at the controls, while Moira "Hold tight! We're grounding!" cried Dick. I'm afraid we've—er—selected a wet landing field. We seem to be under water!" Dick cried, "Hey, this is bad! We'd better get out of here—" rocked and trembled, but did not move. Again Dick tried to jet the and churning through the crack. Deeper and swifter. Dick cut motors and Mom cried, "But—but our supplies, Dick! What are we going to do for "We'll worry about that later. Right now we've got to think of remember how to climb into 'em? Eleanor—you take that oversized one. That's right. There's room for you and The Pooch—" The water was almost ankle deep in the control room by the time they they followed Dick to the airlock. It was weird, and a little bit frightening, but to Bobby it was thrilling, too. This was the sort of thing you read stories about. Escape from a flooding ship.... They had time—or took time—to gather together a few precious belongings. Eleanor packed a carrier with baby food for The Pooch, Mom a bundle of provisions hastily swept from the galley bins Pop with blankets and clothing, Dick burdened himself and Bobby with At the lock, Dick issued final instructions. , they fled. The airlock was small. There was room for but one at a time. The water was waist—no, breast-deep—by the time all were gone save Bobby and Dick. Bobby, whose imagination had already assigned him the command of the foundering ship, wanted to uphold the ancient traditions by being the last to leave. But Dick had other ideas. He shoved Bobby—not too feeling in his stomach. Almost immediately a hard something clanged! popped out of the water. Dick. Dick's voice was metallic through the audios of the space-helmet. "All here, Pop? Everybody all right? Swell! Let's strike out for the shore, there. Stick together, now. It isn't far." Pop said, "The ship, Richard?" "We'll find it again. I floated up a marking buoy. That round thing Swimming in a bulger, Bobby found, was silly. Like paddling a big, warm, safe rubber rowboat. The stars winked at him, the soft waves explored his face-plate with curious, white fingers of spray. Pretty soon there was sand scraping his boots ... a long, smooth beach with had even been frightening. Throughout the night, the Moseley clan huddled together there on the beach, waiting, silent, wondering. But when the sun burst over the horizon like a clamoring, brazen gong, they looked upon this land which was their new home—and found it good. Dick asked, "Isn't that a remarkably slow rotation? For such a tiny "Eros has many peculiarities. Some of them we have discussed before. It approaches Earth nearer than any other celestial body, excepting Luna Dick roused himself. Four Eros days—the equivalent of forty-two Earth hours or so—had passed since their crash landing. In that short time, much had been done to make their beach camp-site comfortable. All members of the family were waiting now for Dick to return. for a little while, Father. We can't get fresh foods until we're settled we can't settle until—Ah! Here comes Dick!" What'd you l'arn, Dicky-boy?" Dick removed his helmet, unzipped himself from his bulger, shook his airlock again if the ship keeps on settling. The whole prow split wide open when we hit, the ship is full of water. The flour and sugar and things like that are ruined. I managed to get a few more things out, though. Some tools, guns, wire—stuff like that." might as well move." "Move?" demanded Grampaw. "What's the matter with the place we're at?" "For one thing, it's too exposed. An open beach is no place for a permanent habitation. So far we've been very lucky. We've had no storms. But for a permanent camp-site, we must select a spot further inland. A fertile place, where we can start crops. A place with fresh, running water, natural shelter against cold and wind and rain—" "What'll we do?" grinned Dick. "Flip a coin?" "No. Happily, there is a spot like that within an easy walk of here. either side. There, I think, we should build." Dick nodded. "Fish from the sea, vegetables from our own farm—is there any game, Pop?" "That I don't know. We haven't seen any. Yet." "We'll find out. Will this place you speak of be close enough to let me continue working on the

<question>:
What was Dick's main concern about moving their camp to the river?

<options>:
A What the weather would be in the new location.
B When to start building the encampment.
C Deciding where exactly to start building.
D Food and proximity to the sunken ship.

<answer>:

D