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

<passage>:
R Earth doctor to see that he didn't! the U.S. copyright on this publication was renewed.] meant Top Grade Planetary Emergency, and don't argue about it, fellows, spun in its tracks, so to speak, and began homing on the VI planet didn't quite register with anybody, just then. here fast." "Trouble?" said the squawk-box, sleepily. "Oh, brother," said Jenkins. "Somebody's cracked the Contract Code or something." A moment later a tall sleepy man in green undershorts appeared at changed course." ?" "You tell me," said Jenkins. "Wait a minute. Seems to me there was some sort of nasty business—" Jenkins nodded heavily. "There sure was. Five successive attempts to establish a Contract with them, and five times we got thrown out bodily. The last time an Earth ship landed there half the crew was the folks on Morua II didn't want a Contract with Hospital Earth. And doctors and spells." He tossed the Info-card down the chute with a growl. "So now we have an emergency call from them in a Contract code they couldn't possibly know." "Obviously." there, are we?" "What else? You know the law. Instantaneous response to any 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 Contract had been signed with Deneb III centuries before, Hospital Earth had laboriously built its reputation on that single foundation 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 Contract. In the early days of galactic exploration, of course, Medical Services was only a minor factor in an expanding commercial network that drew multitudes of planets into social and economic interdependence in any growing civilization division of labor inevitably occurs. Other planets outstripped Earth in technology, in communications, in transport, and in production techniques—but Earth stood unrivaled in its development of the biological sciences. Wherever an Earth ship 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 surgery—were able to handle the problems on the spot and by themselves. It was a rugged service for a single planet to provide, and it was costly. Many planets studied the terms of Contract and declined, pleasantly but firmly—and were assured nevertheless that GPP ships The homed on the dismal grey planet with an escort of eight "Well, you took long enough!" he roared, baring a set of yellow fangs Contract? Where did you get the Code?" "Bother the Contract," the Moruan snarled. "You're supposed to be physicians, eh?" He eyed them up and down as though he disapproved of he wore a long purple cap with a gold ball on the end which twitched wildly as their whispered conference devolved into growling and snarling. Finally "The Lord High Emperor of All Morua and Creator of the Galaxies," Aguar is all over. We have heard about you wizards from Hospital Earth. You gave them a terrible grin and tightened his hand on the gold-encrusted sword. "Now we see." "We can't promise," Jenkins began. "Sometimes we're called too late—but perhaps not in this case," he added hastily when he saw the "What kind of freedom?" Half the planetary population wiped out before they realized that the grimly. "Well, what did you expect me to do—politely refuse? And have our throats slit right on the spot?" He grabbed a pad and began scribbling. "We've got to do physiologists, anatomists, microbiologists, radiologists—survey workers from every Service would examine and study the new clients, take them apart cell by cell to see what made them tick. Certain basic principles were always the same, a fact which accelerated with an organized central nervous system and a functional division of compared, and the information used in combating native disease. Given no major setbacks, and full cooperation of the natives, the job only took about six months to do— For the crew of the Lancet Degeneration?" magic and all. Maybe you were the boys that turned thumbs down so violently on the idea of a Hospital Earth Contract, eh? Couldn't risk having outsiders cutting in on your trade." Jenkins rubbed his chin for a long moment. Then: "You're an idiot. It can't be done." "Suppose it could." "Won't it, now! Well, we have iron show us these things?" he asked suspiciously. "I'll make a bargain," said Jenkins. "You give us a Contract, we give you the power—fair enough?" More whispers. Wally Stone tugged at Sam's sleeve. "What do you think "Maybe not," said Sam. "Look, I've got an idea—risky, but it might work if you'll play along. We can't lose much." bargain," he said. " After you show us." That would open their eyes all right." of four, with new rawhide. When His Eminence protested this, we were two—" Jenkins winced as the accounting of cabalistic clap-trap continued. His Eminence, he reflected, must have had the constitution of an ox. He arrangement Jenkins had prepared. "What's that?" "I told you about the iron needles, didn't I? Hold this a moment." the second he adjusted to a steady drip-drip-drip. "Fine. Now this is most important." Jenkins searched in the bag until he found a large mortar which he set down on the floor. Squatting behind it, he began tapping it slowly with the pestle, in perfect rhythm with the intravenous drip ... and waited. down on a bench in the hall and fell asleep in an instant. They woke him once, hours later, to change the intravenous solution, regular. , where Wally Stone stared in disbelief as Jenkins and Kiz bowed and hugged each other like long-lost brothers at a sad farewell. "I finally got 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...." of parchment, stricken through with the colors of the seven Medical Services of Hospital Earth. "Take a look, my boy—the juiciest Medical Services Contract that's been written in three centuries—" He tossed the Contract in the dry-storage locker with a sigh. "Old Kiz just finished his first lesson, and he's still wondering what went on—" "So am I," said the Green Doctor suspiciously. "With what? Incantations?" "Oh, the incantations were for the doctors ," said Jenkins. "They expected them, obviously, since that was the only level of medicine they could understand. And incidentally, the only level that could possibly get us a Contract. Anyway, I couldn't do very much else, under the circumstances, except for a little supportive therapy. Without a Bio-survey we were hamstrung. But whatever the Pox is, it obviously "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 up her little black bag and go home." He smiled into the mirror as he adjusted the scarlet band of the Red Service across his shoulders. "We call it Tincture of Time," he said.

<question>:
When did the earth earn its new title?

<options>:
A When humans from Earth started giving medical care wherever they traveled
B When Earth became known as unrivaled in its development of the biological sciences
C When humans from Earth became known as Galactic Pill Peddlers
D When the first contract was signed

<answer>:

D