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

<passage>:
Earth coins." Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] A hayseed Martian among big-planet slickers ... of course he would get into trouble. But that was nothing compared to the trouble he would be in if he did not get into trouble! 'What mysterious knowledge did the Old Martians possess? What was the secret wisdom of the Ancient Aliens? Now the incredibly powerful "Well, hurry up with whatever it is," snapped Peri. "I got a date tonight." "I'll say you do! With a Martian!" Peri narrowed her silver-blue gaze and looked icily at him. "You must "That's about all, so far," confessed Matheny. "Perhaps a con is our only hope. I've been wondering, maybe we could organize a Martian Doran's thin sharp face grinned. "You break that date, Peri. Put it off or something. I got this Martian for you, see?" "So? Since when has all Mars had as much spending money as one big-time marijuana rancher? Not to mention the heir ap—" "Sure, sure. But how much are those boys going to spend on any girl, even a high-level type like you? Listen, I need you just for tonight, see? This Martian is strictly from gone. He is here on official What set him gasping was the air. It weighed like a ton of wool and had apparently sopped up half the Atlantic Ocean. Ears trained to listen through the Martian atmosphere shuddered from the racket conducted by Earth's. The passport official seemed to bellow at him. "Pardon me for asking this. The United Protectorates welcome all visitors to Earth and I assure you, sir, an ordinary five-year visa provokes no questions. But since you came on an official courier boat of your planet, Mr. Matheny, regulations force me to ask your business." Mars, would they?" "Oh, we don't expect immigration," said Matheny shyly. He was a fairly he asked himself in a surge of homesickness. What the hell is the Martian Embassy here for? He, Peter Matheny, was no more than a peaceful professor of sociodynamics at Devil's Kettle University. Of course, he had advised but he wasn't tired the spaceport would pneumo his baggage to him whenever he did check in. The few Martians who had been to Earth had gone into ecstasies over the automation which put any service you could name on a twenty-four-hour basis. But it would be a long time before Mars had such machines. If ever. The city roared at him. the Embassy can't act. I may find it advisable to go outside the law. Please, sir, where can I contact the underworld? He wished gambling were legal on Earth. The Constitution of the Martian Republic forbade sumptuary and moral legislation quite apart from the was a practical necessity. Life was bleak enough on the deserts, without being denied the pleasure of trying to bottom-deal some friend The frightful thing about the Earthman was the way he seemed to exist only in organized masses. A gypsy snake oil peddler, plodding his syrtosaur wagon across Martian sands, just didn't have a prayer against, say, the Grant, Harding &amp Adams Public Relations Agency. customary form of challenge on Mars. Here, though, they simply pushed chips toward him. He missed a throw, as anyone would at home: simple sleekly pomaded, dapper in blue pajamas with a red zigzag, a sleighbell cloak and curly-toed slippers. "You're from Mars, aren't you?" he asked in the friendliest tone Matheny had yet heard. a Martian. I am very interested." "There aren't many of us on Earth," agreed Matheny. "Just a small embassy staff and an occasional like me." girl one of those Old Martian rings last Ike's Birthday and she was just gazoo about it. A jewel dug out of the City of Time, like, made a million years ago by a, uh, extinct race ... I tell you, she it's a crime to sell such scientifically priceless artifacts, but what can we do? We must live, and the tourist trade is almost nonexistent." "Trouble with it is, I hear Mars is not so comfortable," said Doran. "I mean, do not get me wrong, I don't want to insult you or anything, but export enough to Earth to earn those dollars." "Huh? But they make thyle right on Mars, don't they?" on Mars. The same principle is what's strangling us on everything. Old Martian artifacts aren't really rare, for instance, but freight charges and the middlemen here put them out of the mass market." "Have you not got some other business?" I Was a Slave Girl on Mars . business, I have heard." "It was our mainstay," admitted Matheny, "but it's been overworked. Martian stamps are a drug on the market. What we'd like to operate is a sweepstakes, but the anti-gambling laws on Earth forbid that." Doran whistled. "I got to give your people credit for enterprise, to, well, attract capital from Earth?" "Of course," said Matheny bitterly. "We offer the most liberal concessions in the Solar System. Any little mining company or transport firm or—or anybody—who wanted to come and actually invest a few dollars in Mars—why, we'd probably give him the President's daughter malcontents, oddballs who happen to prefer elbow room and a bill of liberties to the incorporated state—what could General Nucleonics hope to get from Mars?" Martian. "Ahhh!" said Matheny. "Bless you, my friend." "A pleasure." then?" "Yes. I told you we haven't any tourists. I was sent to hire a business manager for the Martian export trade." "What's wrong with your own people? I mean, Pete, it is not your fault cetera. That is just the way Earth is set up these days." Matheny's finger stabbed in the general direction of Doran's pajama top. "Exactly. And who set it up that way? Earthmen. We Martians are babes in the desert. What chance do we have to earn dollars on the scale we need them, in competition with corporations which could buy and sell our whole planet before breakfast? Why, we couldn't afford uncertain lips. "You are from Mars. Okay? So you fought bushcats barehanded in an abandoned canal." "What's a bushcat? And we don't have canals. The evaporation rate—" do it. I would not want to know anything about it. But I could tell you a phone number." He shrugged and gave the Martian a sidelong glance. "Sure, you may not be interested. But if you are, well, Pete, I was not born yesterday. I got tolerance. Like the book says, if you want to get ahead, you have want to say yes, immediately, without reservations. And therefore maybe he became overcautious. They had instructed him on Mars to take chances if he must. "I could tell you a thing or two that might give you a better idea," he said slowly. "But it would have to be under security." he had landed on Earth less than six hours ago. In the end, he did call room service and the machine was trundled in. Doran swallowed the pill and donned the conditioner helmet without an instant's hesitation. "I shall never reveal to any person unauthorized by yourself whatever "Oh, it's simple enough," said Matheny. "It's only that we already are operating con games." "On Mars, you mean?" "Yes. There never were any Old Martians. We erected the ruins fifty years ago for the Billingsworth Expedition to find. We've been manufacturing relics ever since."

<question>:
What effect did Earth's anti-gambling laws have on Mars?

<options>:
A Gambling was not allowed on Mars
B Martians were not able to run a sweepstakes for Earthlings
C Earthlings were not allowed to gamble while on Mars
D Martians were not allowed to gamble while on Earth

<answer>:

B