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

<passage>:
I figured that he figured that I had something to do with the way he looked. "Shipping marocca to Gloryanna III didn't turn out to be a cakewalk after all?" I suggested. did succeed in getting the marocca to Gloryanna III?" I asked anxiously, after the elephants had been admired and sent back home. The success of that venture—even if the job had turned out to be more difficult than we had expected—meant an enormous profit to both of us. The fruit of the marocca is delicious and fabulously expensive. The plant grew only on the single planet Mypore II. Transshipped seeds invariably failed to germinate, which explained its rarity. The Myporians were usually, and understandably, bitterly, opposed to letting any of the living plants get shipped off their planet. But when I offered them a sizable piece of cash plus a perpetual share of the profits for letting us take a load of marocca plants to Gloryanna III, they relented and, for the first time in history, gave their assent. In fact, they had seemed delighted. "I got them there safely," said Captain Hannah. "And they are growing all right?" I persisted. "When I left, marocca was growing like mad," said Captain Hannah. I relaxed and leaned back in my chair. I no longer felt the need of rhial for myself. "Tell me about it," I suggested. Gloryanna III," he said balefully. "I ought to black your other eye." "Simmer down and have some more rhial," I told him. "Sure I get the credit for that. Gloryanna III is almost a twin to Mypore II. You know that marocca takes a very special kind of environment. Bright sun most of the time—that means an almost cloudless environment. A very equable Delta Crucis perpendicular to her direction of motion, put a once-every-twenty-one hour spin on her to match the rotation rates of Mypore II and Gloryanna "So what did you do?" I asked, when that had sunk in. "If the stem doesn't keep winding, the plants die and they can only take a few the plants in the northern hemisphere of Mypore and the other half in the southern hemisphere, it turned out that half of the plants had a sinistral corkscrew and the other half had a dextral. So I had to set the plants up in two different rooms, and run an artificial sun for around me to try to clear the nearby air a little, so that I could have room to think. The midges loved it. But the plants that were in reach died so fast that you could watch their leaves curl up and drop It was on page eleven that it mentioned casually that the midges—the correct word is carolla—are a necessary part of the life cycle of the marocca. The larvae provide an enzyme without which the plants die. "Of course. I immediately stopped slapping at the relatively few midges that had made their way into the head with me, and started to change provide a necessary enzyme. They are supposed to have the same timing of their life cycle as the carolla. Apparently the shaking up I had given their larvae in moving the tanks and dipping the water up in "And the reason they had the same life cycle as the carolla was that the adult dinglebury will eat only the adult carolla, and it has to fill itself full to bursting before it will reproduce. If I had the translation done correctly, they were supposed to dart gracefully "I got up with the sun the next morning. Hell, I had to, considering that it was I who turned the sun on! I found that the dingleburys immediately got busy opening small buds on the stems of the marocca plants. Apparently they were pollinating them. I felt sure that these buds weren't the marocca blossoms from which the fruit formed—I'd seen a lot of those while we were on Mypore II and they were much bigger and showier than these little acorn-sized buds. but I was busy. "Anyway, the action of the dingleburys triggered the violent growth phase of the marocca plants. Did you know that they plant marocca seedlings, back on Mypore II, at least you'll recall, a mature field, which was the only kind we ever saw, is one solid mass of green growth. "The book says that it takes just six hours for a marocca field to shift from the seedling stage to the mature stage. It didn't seem that "And what's more, I found that I couldn't kill the damn things. Not if I wanted to save the plants. The growth only stops at the end of six hours, after the blossoms appear and are visited by the dingleburys. No dingleburys, no growth stoppage. Made them forget all about me. "While they were having their orgy, I caught up on my reading. It was necessary for me to cut back the marocca vines. For one thing, I couldn't get up to the area of the bridge. For another, the main get the plants out of the ship. And I was a little anxious to get my Delta Crucis back to normal as soon as possible. But before cutting, I had to translate the gouge. "It turns out that it's all right to cut marocca as soon as it stops growing. To keep the plants from dying, though, you have to mulch the cuttings and then feed them back to the plants, where the roots store whatever they need against the time of the next explosive period of naturally, which takes several months. "There was one little catch, of course. The cuttings from the vines will poison the plants if they are fed back to them without having been seemed to be enjoying the powerful stuff. He acted as if he thought he had finished. "Well, go on," I urged him. "The marocca plants were still in good shape, weren't they?" Hannah nodded. "They were growing luxuriously." He nodded his head a He said, "They made me burn the entire crop right away, of course. They didn't get all of the carolla or dingleburys, though. Or spores." "Gloryanna III is the original home planet of marocca. They hated the stuff, of course, but they liked the profit. Then, when a plague almost wiped out the dingleburys, they introduced khorram furs as a cash crop. It wasn't as lucrative, but it was so much more pleasant that they outlawed marocca. Took them almost fifty years to stamp it out completely. Meanwhile, some clever native shipped a load of the stuff to Mypore II. He took his time, did it without any trouble and made his fortune. And got out again quickly. "The Gloryannans were going to hold my Delta Crucis as security to pay for the cost of stamping out marocca all over again—those spores sprout fast—and for a time I was worried.

<question>:
What central difference between the planets Gloryanna and Mypore is most important to the story? Why is this significant to Hannah and the narrator?

<options>:
A Mypore has outlawed and eradicated the marocca plants, while Gloryanna continues to cultivate them. Hannah and the narrator think they will be able to make an enormous profit by transporting and selling the plants to Mypore.
B Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to to cultivate the plants. Gloryanna’s population is sick of making treks to Mypore just to purchase marocca, so the narrator and Hannah hope to capitalize on their desire by creating a shipping line between Gloryanna and Mypore.
C Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to to cultivate them. Gloryanna’s population is sick of Myporians trying to sell marocca on their planet, so the narrator and Hannah hope to capitalize on the issue by bringing them to Gloryanna’s black market.
D Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to cultivate the plants. Hannah and the narrator think they will be able to make an enormous profit by transporting and selling the plants to Gloryanna.

<answer>:

D