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

<passage>:
above the desk. So were the Grdznth and Charlie. graceful slow motion against the far wall. "Now why don't you go away, too?" pirouette, and settled gently to the floor like an eight-foot Two rows down a small boy let out a muffled howl and tried to bury himself in his mother's coat collar. An indignant Incompatible. We were dealing with mass, space and dimension—but the energy differential was the important one." they knew from the start that the differential was all on their distance the huge beast had looked like a nightmare combination of large alligator and small tyrannosaurus. Now, at Grdznth were mammals—"docile, peace-loving mammals," good clean snow, thousands of nice jagged mountain peaks. A lovely place, really. Just a little too cold for Grdznth. They thought Earth was much nicer." the seat as the Grdznth breathed at him wetly through damp "For them," whispered Tommy. can't help it. I always misgauge. Last time it was the chancel of St. John's Cathedral. I nearly stampeded morning prayer—" The Grdznth nodded sadly. "It's horrible of me, but I just "For them," Charlie said. east ?" Florida ." "Well, you seem to have drifted through into the wrong airplane," said Pete. "Why Florida?" The Grdznth looked at him reproachfully. "The Wives, of course. The climate is so much better, and they mustn't be disturbed, you know." "Of course," said Pete. "In their condition. I'd forgotten." in the East just now," said the Grdznth. Pete thought of Tommy, red-faced and frantic, beating off million or so—and their spouses, of course." The creature clicked his talons nervously. "We haven't much more time, you know. Only a few more weeks, a few months at the most. If we couldn't have stopped over here, I just don't know what we'd have done." sticking out his tongue at the Grdznth. Florida would be better." "Going to try it again right now? Don't rush off," said Pete. "Oh, I don't mean to rush. It's been lovely, but—" Already the Grdznth was beginning to fade out. "Try four miles down and a thousand miles southeast," said Pete. On the newly finished seventeenth floor, he found Tommy Heinz pacing the corridor like an expectant young father. Tommy had lost weight since Pete had last seen him. His thought you'd never get here!" he groaned. "When you didn't ante-room into the plush director's office, bouncing about excitedly, "I fail to see," said Pete, "just why you had to drag me all the way from L.A. to have a cigar. I've got work to do." "Yes, I know. And the Grdznth are getting worse by the The more Grdznth come through, the more they act as though they own the place. Not nasty or anything—it's that infernal politeness that people hate most, I think. Can't get them mad, can't get them into a fight, but they do anything they please, the Grdznth just go right ahead anyway." the Grdznth a bit—they have personal protective force fields Anybody who tries anything fancy gets thrown like a bolt of The Grdznth agreed to leave at a specified time, and something in their cultural background makes them stick strictly to their agreements. But that's just what the psych-docs think, and "And the appointed time?" Tommy spread his hands helplessly. "If we knew, you'd still be in L.A. Roughly six months and four days, plus or minus a month for the time differential. That's strictly tentative, according to the math boys. It's a parallel universe, one of several thousand already explored, according to the Grdznth scientists working with Charlie Karns. Most of the parallels are analogous, and we happen to be analogous to the Grdznth, a point we've omitted from our PR-blasts. They have an eight-planet system around a hot sun, and it's going to get lots hotter "Apparently. Nobody knows how they predicted it, but they did. Spotted it coming several years ago, so they've been romping through parallel after parallel trying to find one they can migrate to. They found one, sort of a desperation choice. It's cold and arid and full of impassable mountain chains. With an uphill fight they can make it support a fraction of their population." Tommy shook his head helplessly. "They picked a very sensible system for getting a good strong Grdznth population on the new parallel as fast as possible. The males were picked for brains, education, ability and adaptability the females were chosen largely according to how pregnant they were." Pete grinned. "Grdznth in utero. There's something poetic about it." that climate, at least not until they've been there long enough to get their glands adjusted. Seems we have just the right climate here for gestating Grdznth, even better than at home. So they came begging for permission to stop here, on the way through, to rest and parturiate." "So Earth becomes a glorified incubator." Pete got to his masses, why did we let them in here in the first place?" He see. The fee is so high, Earth just can't afford to lose it. Charlie Karns'll tell you why." "It's the parallel universe business, of course," he said to Pete, with Tommy beaming over his shoulder. "The Grdznth which means the greatest advance in power utilization since fire was discovered. It might give us the opening to a concept of time travel that makes some kind of sense. And power! If there's an energy differential of any magnitude—" "We'll also know the time-differential," said Tommy hopefully, "and how long the Grdznth gestation period will be." "It's a fair exchange," said Charlie. "We keep them until the mass and dimension." Pete nodded. "That is, if you can make the people put up with them for another six months or so." The Grdznth sitting on the stool looked regretfully from the years off the face of any woman in Hollywood. But he's not getting to first base with Gorgeous over there. This is only one thing we've tried," he added as they moved on down the corridor. "You should see the field reports. We've tried selling the of nowhere, anywhere. In church, in bedrooms, in rush-hour traffic through Lincoln Tunnel—look!" is focused completely on a collection of five thousand letters, telegrams, and visiphone calls I've received in the past three clear. If the Grdznth do not go, I go." for all the little Grdznth to arrive, and nobody's given them a Grdznth are lovable?" sudden, harsh, or crude—but slowly, in a radio comment here or a newspaper story there, the emphasis began to shift from suddenly shifted from 6:30 Monday evening to 10:30 Saturday night. Copy rolled by the ream from Tommy's office, refined copy, hypersensitively edited copy, finding its way into the light of day through devious channels. Three days later a Grdznth miscarriage threatened, and Determined movements to expel the Grdznth faltered, trembled with indecision. The Grdznth were ugly, they frightened the room in an overflow of nervous energy. "I can see it now. Open shafts instead of elevators. A quick hop to Honolulu for an afternoon on the beach, and back in time for supper. A hundred miles to the gallon for the Sunday driver. When what the Grdznth are giving us, they'll the Grdznth girls to gestate. But what are we hearing from the Grdznth There was dead silence in the room. "Baby Grdznth,"

<question>:
Why did the Grzdnth choose Earth to travel to?

<options>:
A The Earthlings were very hospitable
B It had the right climate for their gestation period
C There was a large source of food for them
D It was nearby in location to their most previous home

<answer>:

B