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 doctor to see that he didn't! the U.S. copyright on this publication was renewed.] They didn't realize they were in trouble until it was too late to stop it. The call from Morua II came in quite innocently, relayed to the ship from HQ in Standard GPP Contract code for crash priority, which meant Top Grade Planetary Emergency, and don't argue about it, fellows, just get there, fast. Red Doctor Sam Jenkins took one look at the Lancet spun in its tracks, so to speak, and began homing on the call-source like a hound on a fox. The fact that Morua II was a Class VI planet didn't quite register with anybody, just then. Ten minutes later the Red Doctor reached for the results of the Initial Information Survey on Morua II, and let out a howl of alarm. A single card sat in the slot with a wide black stripe across it. the control room, rubbing his eyes. "What happened?" he said. "We've changed course." "Yeah. Ever hear of Morua II?" Green Doctor Wally Stone frowned and scratched his whiskered chin. "Sounds familiar, but I can't quite tune in. Crash call?" His eye caught the black-striped card. "Class VI planet ... a plague spot! How bodily. The last time an Earth ship landed there half the crew was summarily shot and the others came home with their ears cut off. Seems the folks on Morua II didn't want a Contract with Hospital Earth. And they're still in the jungle, as far as their medicine goes. Witch doctors and spells." He tossed the Info-card down the chute with a how Morua II got the code, but they got it, and that's all the farther we're supposed to think. We answer the call, and beef about it later. If we still happen to be around later, that is." It had always been that way. Since the first formal Medical Service stone: immediate medical assistance, without question or hesitation, whenever and wherever it was required, on any planet bound by Contract. That was the law, for Hospital Earth could not afford to jeopardize a In the early days of galactic exploration, of course, Medical Services multitudes of planets into social and economic interdependence Other planets outstripped Earth in technology, in communications, in its development of the biological sciences. Wherever an Earth ship landed, the crew was soon rendering Medical Services of one sort or another, whether they had planned it that way or not. On Deneb III the Medical Service Contract was formalized, and Hospital Earth came into being. Into all known corners of the galaxy ships of the General Practice Patrol were dispatched—"Galactic Pill Peddlers" forging a chain of Contracts from Aldebaran to Zarn, accepting calls, diagnosing ills, arranging for proper disposition of whatever medical problems they came across. Serious problems were shuttled back to Hospital Earth more frequently the GPP crews—doctors of the Red and Green services, representing the ancient Earthly arts of medicine and It was a rugged service for a single planet to provide, and it was costly. Many planets studied the terms of Contract and declined, would answer an emergency call if one was received. There would be a fee, of course, but the call would be answered. And then there were other planets—places such as Morua II.... The homed on the dismal grey planet with an escort of eight crash into a landing slot on the edge of the city. As Sam Jenkins and the scarlet and green uniforms of their respective services, the main entrance lock burst open with a squeal of tortured metal. At least a dozen Moruans poured into the control room—huge bearlike creatures with heavy grey fur ruffing out around their faces like thick hairy physicians, eh?" He eyed them up and down as though he disapproved of embattled corridors, it seemed likely they were nearing the seat of whispered conference devolved into growling and snarling. Finally Aguar motioned them to follow, and they entered the far chamber, with growled. "Who is His Eminence?" Jenkins asked. "The Lord High Emperor of All Morua and Creator of the Galaxies," Aguar rumbled. "He is the Tenth Son of a Tenth Son, and it is written that he can never die. When you enter, bow," he added. bowed or not. The room was dark and rank with the smell of sickness. On a pallet in the center lay a huge Moruan, panting and groaning. He was wrapped like a mummy in bedclothes of scarlet interwoven with gold on The Red Doctor blinked at his companion, then turned to Aguar. "What We have you here now. You are doctors, you say. Cure "How should I know? I've never seen a healthy Moruan before, to say nothing of a sick one. It looks like a pox all right." "Probably a viremia of some sort." Jenkins went over the great groaning hulk with inquiring fingers. "If it's a viremia, we're cooked," Stone whispered. "None of the drugs "What about your own doctors?" is all over. We have heard about you wizards from Hospital Earth. You the humors and drive forth the spirits of the Pox like devils." He "We'll need supplies and information from our ship. We'll have to consult your physicians. We'll need healthy Moruans to examine—" Half the planetary population wiped out before they realized that the antibiotic was more deadly to the race than the virus was...." "Might not be such a bad idea for Morua," the Red Doctor muttered send in a full crew of technicians to a newly-Contracted planet to make the initial Bio-survey of the indigenous races. Bio-chemists, physiologists, anatomists, microbiologists, radiologists—survey doctor from Sol III. Anatomy was a broad determinant: a jelly-blob from Deneb I with its fine skein of pulsating nerve fibrils was still just a jelly-blob, and would never rise above the level of amoeboid yes-no response because of its utter lack of organization. But a creature with an organized central nervous system and a functional division of work among organ systems could be categorized, tested, studied, and compared, and the information used in combating native disease. Given For the crew of the handled external examinations and blood and tissue chemistries ran the X-ray and pan-endoscopic examinations. After four grueling Wizards for a while?" Aguar's guards urged the tall Moruan with the purple cap into the control room at gunpoint, along with a couple of minor medical the Red Doctor cut him off. "It violently on the idea of a Hospital Earth Contract, eh? Couldn't risk The Moruan was visibly shaken. He held a whispered conference with his henchmen. "You'll show promises, pills and post-mortems. That's the Medical service for you." "No thanks, not me. This is a medical case and it's all yours. What do poke holes in the healthy ones! And then you send in the fortunate ones. They grow hot and sick, but they still can eat fighting, but the tube went down. The Red Doctor ground three white They escorted him in triumphal procession back to the , where through to somebody at HQ," he said as the Red Doctor climbed aboard. Morua is not a Contract planet and we're not supposed to be here in the first place, but that's the best they can do...." "Tell them to forget the armada," said Jenkins, grinning. "And anyway, of parchment, stricken through with the colors of the seven Medical Services of Hospital Earth. "Take a look, my boy—the juiciest Medical "So am I," said the Green Doctor suspiciously. doctors expected them, obviously, since that was the only level of medicine "Not quite," said the Red Doctor. "You're forgetting that I had one other prescription to use—the oldest, most trustworthy thousand years ago. Without it, Hospital Earth might just as well pack

<question>:
Which planets do the physicians visit during the events of the story?

<options>:
A Morua II
B Deneb III
C Lancet
D Morua II and Deneb III

<answer>:

A