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

<passage>:
By EMMETT McDOWELL Death was Jaro Moynahan's stock in trade, and every planet had known his touch. But now, on Mercury, he was selling his guns into the Planet Stories Summer 1945. On the stage of Mercury Sam's Garden , a tight-frocked, limber-hipped, red-head was singing " The Lady from Mars ." The song was a rollicking, ribald ditty, a favorite of the planters and miners, the space pilots and army officers who frequented the garden. The girl rendered it with The girl, with an almost imperceptible gesture, shook her head. The night was very hot but then it is always hot on Mercury, the newest, the wildest, the hottest of Earth's frontiers. Fans spaced about the garden's walls sluggishly stirred the night air, while the yellow-eyed Mercurians, seemed unaffected by the heat. They didn't brown face. The girl drew in her breath. "No! Mercury is not ready for freedom. Only a handful of fanatics are engineering the revolution. The real Mercurian patriots are against it, but they are afraid to protest. You've got to believe me. The revolution is scheduled to break during the Festival of the Rains. If it does, the Terrestrials here will be massacred. The Mercurians hate them. We haven't but a handful of troops." "Why call me all the way from Mars for that? Why not have that gunman at the piano rub Hodes out?" The girl started, glanced at the pianist, said with a shiver: "We can't locate Karfial Hodes. Don't look at me that way, Jaro. You frighten me. I'm telling the truth. We can't find him. That's why we called you. You've got to find him, Jaro. He's stirring up all Mercury." "Who's putting up the money?" "I can't tell you." "Ah," said Jaro Moynahan "so that's the way it is." "That's the way it is." "No," the girl replied. "But we think he's here in the city." glowing in light, the next the hot black night swooped down on the "Red!" he repeated, louder. Unexpectedly, the deep, ringing voice of Mercury Sam boomed out from the stage. "It's all right. The master fuse blew out. The lights will be on in a It made him think of cool green grapes beaded with dew. On the hot, teeming planet of Mercury it was as refreshing as a cold plunge. He wondered who was putting up the ten thousand Earth notes? Who stood to lose most in case of a revolution? The answer seemed obvious enough. was a tremendous demand throughout the Universe. And what had happened to the girl. Had the rebels abducted her. If a thought struck Jaro. These yellow-eyed Mercurians could see as well in the dark as any alley-prowling cat. For centuries they had lived most their lives beneath ground to escape the terrible rays of the sun. Only at night did they emerge to work their fields and ply their possibility. If the girl had been abducted, only Mercurians could have and the Mercurians were a clannish lot. either side: buildings with walls four feet thick to keep out the heat of the sun. Beneath his feet, he knew, stretched a labyrinth of rooms and passages. Somewhere in those rat-runs was Karfial Hodes, the when he thought he detected a footfall behind him. It was only the earth walls, the sly shuffle of a step. He ducked down a bisecting interest. He had, he supposed, killed rather a lot of men. He had fought in the deadly little wars of the Moons of Jupiter for years, then the Universal Debacle of 3368, after that the Martian Revolution as well as dozens of skirmishes between the Federated Venusian States. No, there The Mercurians, he knew, had been agitating for freedom for years. Why, at this time when the Earth Congress was about to grant them self-government, should they stage a revolution? "Why, no. As it happened she was abducted before I had the chance." Mr. Peet licked his lips. "But you will, surely you will. Unless Karfial Hodes is stopped immediately there will be a bloody uprising all over the planet during the Festival of the Rains. Earth doesn't realize the seriousness of the situation." "Then I was right it is you who are putting up the ten thousand Earth here, Mercurians as well as Earthmen, who recognize the danger. We have—ah—pooled our resources." is—ah—lucrative." Jaro Moynahan lit a cigarette, sat down on the edge of the bed. "Why gained control of the Latonka trade. Other Earthmen are in control of the mines and the northern plantations. Together you form perhaps the strongest combine the Universe has ever seen. You actually run Mercury, and you've squeezed out every possible penny. Every time self-government has come before the Earth Congress you've succeeded in " Earth Congress suspends negotiations on Mercurian freedom pending investigation of rumored rebellion. Terrestrials advised to return to Earth. Karfial Hodes, Mercurian patriot, being sought. " cool gloom, and Jaro had to feel his way, rubbing shoulders with the strange, silent populace. But when he reached the Terrestrial quarter of the city, bright radoxide lights took the place of the green globes, step on you as I might a spider." "Rush over where?" said the girl in the visoscreen. "These gadgets The girl in the visoscreen thawed like ice cream in the sun. "I'm sure better of it, glanced around helplessly. Miss Webb's eyes grew round as marbles. "I wouldn't touch one of those nasty little contraptions for all the Latonka on Mercury." "Another morning like this and I take the first space liner back to Earth." She jammed her hat on backward, snatched her bag from the desk you whatever you believe your time is worth. Say five hundred Earth be on the next liner back to Earth." Warily he started down the passage toward the native quarter. At the " Bang! "Never a dull moment," she gritted. Still grinning, Jaro sat down. "I'm Jaro Moynahan, Miss Webb. I think Albert Peet forgot to introduce us. There's some skullduggery going on here that I'm particularly anxious to get to the bottom of. I thought Jaro's order. "All right," Jaro smiled, but his pale blue eyes probed the girl dangerous for you to know. Are you game, Miss Webb?" "Since we're going to be so chummy," she replied "you might begin by calling me Joan. You make me feel downright ancient." I was offered ten thousand Earth notes to assassinate the leader of the revolution." "What revolution? I'm going around in circles." "The Mercurians, of course." "I don't believe it," said the girl. "The Mercurians are the most peaceable people in the Universe. They've been agitating for freedom, "Score one," breathed Jaro, "I begin to see light. Miss Webb—ah, Joan—I've a notion that we're going to be a great team. How do you happen to be Albert Peet's private secretary?" is almost on the rocks. Their stock has been dropping like a meteor." Jaro Moynahan raised his oblique brows but did not interrupt. will touch the stock, not since it looks as if the Earth Congress is going to grant the Mercurians their freedom. Everybody knows that the first thing the Mercurians will do, will be to boot out the Latonka Trust." "What about this Karfial Hodes?" said Jaro. "I've heard that he's inciting the Mercurians to rebellion. The newscaster had a line about the revolution too. The government has advised all Terrestrials to return to Earth." "It's not true," Joan flared. "It's all a pack of lies invented by the Latonka Trust. I know."

<question>:
Which planet was considered the new frontier?

<options>:
A Mars
B Earth
C Mercury
D Jupiter

<answer>:

C