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

<passage>:
[Transcriber's Note: This etext was produced from can never replace practice in an art. Food, on the other hand, is a his diet, a fruit known to us mariners of a more sophisticated age algae that, by filling up the spaces within, open the history—whether it be exterminating whales, or introducing syphilis no Marsman will undertake to review this inventory of refreshment more than a week from groundfall. A catalogue of sides of beef and heads of their war on canned pork and beans. The periplus of Earth with a galley stocked with frozen pizza and concentrated apple-juice. But then, when sailors left the seas for the food. The earliest men into the vacuum swallowed protein squeezings from aluminum tubes, and were glad enough to drop back to the groundsman's diet of steak and fried potatoes. what was day-before-yesterday's table-scraps and jakes-water. offal into eatables, is in many ways the most vital man aboard a in deep space, half dead from deuterium poisoning. We think of the incident, too, caused by a Ship's Cook who allowed the stomach of every man aboard, where it fermented each subsequent the ancient observation, "God sends food, and the Devil sends cooks," Sale . The the low-energy route to Mars, a pathway about as long in time as the human period of gestation. Our cargo consisted mostly of Tien-Shen fir seedlings and some tons of an arctic grass-seed—these to be planted tensions of biochemistry, applied mycology, high-speed farming, dietetics and sewage engineering. It's the Cook's responsibility to see that each man aboard gets each day no less than five pounds of water, two pounds of oxygen, and one-and-a-half pounds of dry food. Twelve tons of water, oxygen, and food would have filled the cargo no reason to reach for Mars. By allowing a colony of Chlorella algae to work over our used air, water and other effluvia, though, three tons of metabolites would see us through from Brady Station to Piano West and back. Recycling was the answer. The molecule of carbohydrate, fat, protein or mineral that didn't feed the crew fed the algae. And the algae fed us. All waste was used to fertilize our liquid fields. Even the stubble from our 2,680 shaves and the clippings from our 666 haircuts en route and back would be fed into the Chlorella tanks. Human hair is rich in essential amino acids. The algae—dried by the Cook, bleached with methyl alcohol to kill the smell and make the residue more digestible, disguised and seasoned in a hundred ways—served as a sort of meat-and-potatoes that never quite wore out. Our air and water were equally immortal. Each molecule of glomeruli of each kidney on the ship before we grounded in. Groundling politicians are right enough when they say that we spacers are a breed apart. We're the one race of men who can't afford the luxury of done splendidly as Drill Instructor for their boot camp. His heart was a chip of helium ice, his voice dripped sarcastic acid. The planet hemorrhoid. The Captain's particular patsy was, of course, young Bailey the Cook. of synthetic methionine—an essential amino acid not synthesized by For dessert, he served a fudge compounded from the dextrose-paste of the carbohydrate recycler. The crew thanked him. The Captain did not. you eat. I think you are impertinent to suggest I should become this give his mother is to be absent from her on Mother's Day. But we've got my time, and I'll testify that you set a table second to none." Bailey took a handful of dried Chlorella from a bin and fingered it. It guess: the hours spent preparing a green Chlorella paste, rolling and drying and shaping each artificial leaf, the fitting together of nine heads like crisp, three-dimensional jigsaw puzzles. The pièce de mass that made it up was buried in a rich, meaty gravy that was only this pond-scum raw than have it all mucked-up with synthetic onions and cycler-salt." bite. "But I eat only as a man in the desert will eat worms and "You are a spacer and a Ship's Cook, not a suburban or weeping. Only—can you understand this, so simple?—food that will keep my belly content and my brain alive." somehow to bring good food from Chlorella tanks." cheerlessly appear in the dining-cubby, to have his culinary genius turkey-flesh was white and tender. Bailey served with this delicacy a grainy and delicious "cornbread," and had extracted from his algae a lipid butter-substitute that soaked into the hot "bread" with a Captain and their Cook served to feed them so well. Most spacers embark on an outward voyage somewhat plump, having eaten enough on their last few days aground to smuggle several hundred calories of fat and many memories of good food aboard with them. This trip, none of the men had Each man aboard a spacer is allowed ten kilograms of personal effects ration. He may thus bring aboard with him some forty-five pounds of books, playing-cards, knitting-wool, whiskey or what have you to help fact, had used up his weight-allowance in bringing aboard a case of spices: marjoram and mint, costmary, file powder, basil and allspice, exercised his option of returning his personal-effects weight allowance To collect the maximum allowance, spacers have been known to come baggage, an unlabeled cardboard box, appeared under the table at noon what was left was to get the should feel like steak to the mouth, and not like baby-food. Right?" "Yes, Sir," Bailey said. "Well, I squeezed the steak-substrate—Chlorella, of course, with all sorts of special seasonings—through a sieve, and blanched the strands in hot algaeal oil. Then I chopped those strands to bits and rolled them out. Voila! I had something very close in texture to the muscle-fibers of genuine meat." "Remarkable, Bailey," I said. "It rather throws me off my appetite to hear how you muddle about with the meal." masterpiece. "The scarlet burial-shroud for the failures of Cooks." Lifting a hunk of the "steak," streaming ketchup, to his mouth, sufficient ketchup here to see me through to Mars. Please keep a bottle on the table for all my future meals, Belly-Robber." to the welfare of his ship. Were I to continue eating your surrealistic slops for another hundred days, without the small consolation of molecules reclaimed from the head packaged amino acid additives. And he expects meals that would take the blue ribbon at the annual banquet of the Friends of Escoffier!" "Yours is an ancient plaint, Bailey," I said. "You've worked your fingers to the bone, slaving over a hot stove, and you're not appreciated. But you're not married to Winkelmann, remember. A year restaurant of yours and forget about our fat Flying Dutchman." mess compartment, we ate I sat, unfolded my napkin, and looked with hope to the electric warming-pan at the center of the table. Bailey served the three of us with the small "steaks." Each contained about a pound of dried Chlorella, I judged, teasing mine with my fork. But they were drenched in a gravy rich as the stuff grandma used to make in her black iron a bit from my steak and chewed it. Too tender, of course there are plate. "Then have another piece," he said.

<question>:
All of the following is 'recycled' to create extra 'food' EXCEPT for:

<options>:
A urine
B hair
C algae
D bones

<answer>:

D