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

<passage>:
Grdznth problem getting to be a PRoblem, need above the desk. So were the Grdznth and Charlie. see any Grdznth babies. It's going to be a little too cold for that. The energy factor," he mumbled. "Nobody thought of that except in passing. Should have, though, long ago. Two completely independent universes, obviously two energy systems. Incompatible. We were dealing with mass, space and dimension—but the energy differential was the important one." "What about the energy?" "We're loaded with it. Super-charged. Packed to the breaking side—a million of them unbalances four billion of us. All they needed to overload us completely was time for enough Grdznth were mammals—"docile, peace-loving mammals," side, the other side pops out. And we're the other side. When?" green. "Like a rubber ball with a dent in the side. Push in one "Any day now. Maybe any minute." Charlie spread his A lovely place, really. Just a little too cold for Grdznth. They thought Earth was much nicer." "For them," whispered Tommy. "For them," Charlie said. The Grdznth nodded sadly. "It's horrible of me, but I just 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." in the East just now," said the Grdznth. million or so—and their spouses, of course." The creature clicked his talons nervously. "We haven't much more time, you sticking out his tongue at the Grdznth. Florida would be better." the Grdznth was beginning to fade out. plague all the way to New Philly. giz." "Yes, I know. And the Grdznth are getting worse by the The more Grdznth come through, the more they act as though the Grdznth just go right ahead anyway." the Grdznth a bit—they have personal protective force fields The Grdznth agreed to leave at a specified time, and something in their cultural background makes them stick strictly to their 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 any day now." Pete's eyes widened. "Nova?" "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." system for getting a good strong Grdznth population on chosen largely according to how pregnant they were." Pete grinned. "Grdznth in utero. There's something poetic 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 feet thoughtfully. "This is all very touching," he said, "but it just doesn't wash. If the Grdznth are so unpopular with the parking fee?" "Plenty," said Tommy heavily. "That's the trouble, you see. The fee is so high, Earth just can't afford to lose it. Charlie Karns'll tell you why." Charlie Karns from Math Section was an intense skeleton of shoulders like a shroud. In his arms he clutched a small black box. "It's the parallel universe business, of course," he said to Pete, with Tommy beaming over his shoulder. "The Grdznth can cross through. They've been able to do it for a long time. According to our figuring, this must involve complete control of mass, space and dimension, all three. And time comes into one of the three—we aren't sure which." released the lid. Like a jack-in-the-box, two small white plastic spheres popped out and began chasing each other about in the air six inches above the box. Presently a third sphere rose up from the box and joined the fun. and theoretically, it can't work. Among other things, it takes null-gravity to operate." weeks with their top mathematicians, him and a dozen others. How many computers have you burned out, Charlie?" "Four. There's a differential factor, and we can't spot it. They have the equations, all right. It's a matter of translating the differential." "And if you do, then what?" Charlie took a deep breath. "We'll have inter-dimensional control, a practical, utilizable transmatter. We'll have null-gravity, 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—" He shook his head sadly. "and how long the Grdznth gestation period will be." "It's a fair exchange," said Charlie. "We keep them until the girls have their babies. They teach us the ABC's of space, 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 chair. "What's eating him ?" "Professional pride," said Tommy. "He can take twenty 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 advances Earth will have, the wealth, the power. No dice. The man on the street reads our PR-blasts, and then looks up to see one of the nasty things staring over his shoulder at the newspaper." dropped into a chair with a sigh and flipped a switch. "Okay, what is it now?" "Just another senator," said a furious male voice. "Mr. something." "Do something! You think I'm a magician? I can just make clear. If the Grdznth do not go, I go." they aren't lovable. They aren't even passably attractive. There's one thing they are for all the little Grdznth to arrive, and nobody's given them a like a billion harps." The color was back in Tommy's cheeks, and the senator was forgotten as a dozen intercom switches began snapping. "We'll Grdznth are lovable?" Grdznth in general to Grdznth as mothers. A Rutgers professor copy, hypersensitively edited copy, finding its way into the light of day through devious channels. Three days later a Grdznth miscarriage threatened, and with indecision. The Grdznth were ugly, they frightened Not even expectant Grdznth mothers. 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 what the Grdznth are giving us, they'll the Grdznth girls to gestate. But what are we hearing from from Charlie. We've got no transmatter, no null-G, no power, nothing except a whole lot of Grdznth and more coming the Grdznth are giving us." "Well, they can't gestate forever." "Maybe not, but I still have a burning desire to talk to see some baby Grdznth at the end of it all." There was dead silence in the room. "Baby Grdznth,"

<question>:
Where are the Grdznth from?

<options>:
A A different
B Florida
C A parallel universe
D Another planet

<answer>:

C