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

<passage>:
positive of making my point." "Eh?" "Why, ah, there were a number of dispatches," Deputy Under-Secretary Magnan put in. "Unfortunately, this being end-of-the-fiscal-year time, Flamme. So far, I've persuaded the Boyars that this is a matter for the "I don't believe you'll find that in writing," said the Under-Secretary blandly. "In any event, that was sixty years ago. At that time a foothold against Neo-Concordiatist elements was deemed desirable. Now the situation has changed." "The Boyars have spent sixty years terraforming Flamme," Retief said. "They've cleared jungle, descummed the seas, irrigated deserts, set out forests. They've just about reached the point where they can begin to enjoy it. The Aga Kagans have picked this as a good time to move in. "The Boyars needed some co-operation sixty years ago," Retief said. But now that the world is tamed, they're moving in." "The exigencies of diplomacy require a flexible policy—" diplomatic triple-speak. They just want to hold onto the homes they've made out of a wasteland." forward, wattles quivering. "Corps policy with regard to Flamme includes no inflammatory actions based on outmoded concepts. The Boyars "Out of the question. A stiffly worded Protest Note is the best I can do. That's final." Back in the corridor, Magnan turned to Retief. "When will you learn thought I'd save a little time all around." "At times, your cynicism borders on impudence." "At other times, it borders on disgust. Now, if you'll run the Note through for signature, I'll try to catch the six o'clock shuttle." "Leaving so soon? There's an important reception tonight. Some of our in the diplomatic give-and-take." lake, tinged the broad lawn with color, silhouetted tall poplars among flower beds. "You've done great things here in sixty years, Georges," said Retief. "Not that natural geological processes wouldn't have produced the same results, given a couple of hundred million years." "Don't belabor the point," the Boyar Chef d'Regime said. "Since we seem to be on the verge of losing it." "You're forgetting the Note." "A Note," Georges said, waving his cigar. "What the purple polluted in the middle of what used to be a fine stand of barley, cooking sheep's brains over dung fires not ten miles from Government House—and "Say, if that's the same barley you distill your whiskey from, I'd call that a first-class atrocity." "Retief, on your say-so, I've kept my boys on a short leash. They've of paper, that'll be the end. There's a strong vigilante organization here that's been outfitting for the last four weeks. If I hadn't held them back with assurances that the CDT would step in and take care of They've been building up for this push for the last five years. A these monkeys as soon as they set foot on our world." "Slow down, I haven't finished yet. There's still the Note." "I've got plenty of paper already. Rolls and rolls of it." "Give diplomatic processes a chance," said Retief. "The Note hasn't even been delivered yet. Who knows? We may get surprising results." "If you expect me to supply a runner for the purpose, you're out of "A little muscle in the background is an old diplomatic custom," Retief said. The Chef d'Regime stubbed out his cigar thoughtfully. "I used to be a "That," said Retief, "should lend just the right note of solidarity to our little delegation." He hitched his chair closer. "Now, depending on what we run into, here's how we'll play it...." II Slumped in the padded seat, the Boyar Chef d'Regime waved his cigar glumly at the surrounding hills. "Fifty years ago this was bare rock," he said. "We've bred special strains of bacteria here to break down the formations into soil, and we followed up with a program of broad-spectrum fertilization. We planned to put the whole area into crops by next year. Now it looks like the goats will get it." thirty years ago. One of our finest—" The air-car topped a rise. The Chef dropped his cigar and half rose, with a hoarse yell. A herd of scraggly goats tossed their heads among a mouthful of ripe grain. "Did you see that?" Georges yelled. "They've trained the son of a—" A hundred yards away, a trio of brown-cloaked horsemen topped a rise, paused dramatically against the cloudless pale sky, then galloped waiting. Georges scrambled for the side of the car. "Just wait 'til I get my give the opposition a hint of your true feelings. Pretend you're a goat lover—and hand me one of your cigars." The three horsemen pulled up in a churn of chaff and a clatter of "That was close," he said. "I was about out of proverbs." "You sound as though you'd brought off a coup," Georges said. "From the "Maybe I should have boned up on their habits before I joined this expedition." Jelebi," the Aga Kaga said. "I know a few old sayings myself. For example, 'A Bedouin is only cheated once.'" "We have no such intentions, Excellency," Retief said. "Is it not Retief flipped over two pages. "... and with reference to the recent relocation of persons under the Nine, reel 43, as 54 Cygni Alpha, otherwise referred to hereinafter as Flamme—" please some of the old fools—I mean the more conservative members of my government. They're still gnawing their beards and kicking themselves because their ancestors dropped science in favor of alchemy and got themselves stranded in a cultural dead end. This charade is supposed to prove they were right all along. However, I've no time one will have it, and the other will cry morality. The days of my years are numbered, praise be to God. While they last, I hope to eat well, hunt well, fight well and take my share of pleasure. I leave to others dear sir. I'm sure that 'justifiable yearnings for territorial self-realization' would be more appropriate to the situation. Or possibly 'legitimate aspirations, for self-determination of formerly an activity carried on only by those who have inherited the mantle of Colonial Imperialism." "It's pointless to resist," he said. "We have you outgunned and outmanned. Your small nation has no chance against us. But we're not immediately require until such time as you're able to make other arrangements." "And by the time we've got a crop growing out of what was bare rock, you'll be ready to move in," the Boyar Chef d'Regime snapped. "But . You, my dear sir, are but a very small nibble. We won't make the mistake of excessive greed. We shall inch our way to empire—and those who stand in our way shall be dubbed warmongers." "I see you're quite a student of history, Stanley," Retief said. "I wonder if you recall the eventual fate of most of the would-be empire nibblers of the past?" "Ah, but they grew incautious. They went too far, too fast." he has in mind!" "An ancient and honorable custom, from the time of never taken at face value." "But always," Retief said, "there was a critical point at which the man It has been the fate of your spiritual forebears to carve civilization from the wilderness and then, amid tearing of garments and the heaping

<question>:
What is the closest estimate to how long have the Boyar been on Flamme?

<options>:
A Two centuries
B Half a century
C A century
D Quarter of a century

<answer>:

B