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

<passage>:
THE BIG HEADACHE BY JIM HARMON What's the principal cause of headaches? Why, having a head, of course! bewilderment. IV his head. Mitchell's. Both heads were initialed "M" so it was all the same. Mitchell forced himself to awaken, with some initial difficulty. He lay there, blinking the sleep out of his eyes, listening to his "I mean, are you alone?" "Oh, you want to know if my wife is around. No, she's asleep. That Army doctor, Colonel Sidney, he gave her a sedative. I wouldn't let him give me anything, though." forehead. "I've been worrying so much about this I've got the ancestor of all headaches." Mitchell's blue eyes narrowed and his boyish face took on an expression "You've found yourself worrying—thinking—about a lot of other problems since we left you, haven't you? Maybe not the same kind of scientific problem. But more personal ones, ones you didn't used to have time to think about." in the popular mind. He was the man people thought of when the word that the project was nearing completion. If so, it was a case of Ad . The only thing that could delay the project was Macklin's health. Despite his impressive body, some years before he had suffered a mild stroke ... or at least a vascular spasm of a cerebral artery. It was known that he suffered from the vilest variety of migraine. A cycle of the headaches had caused him to be absent from his classes for several weeks, and there were an unusual number of military uniforms seen around the campus. have me intrigued. What is it all about?" "Doctor, we understand you have severe headaches," Mitchell said. Macklin nodded. "That's right, Steven. Migraine." "That must be terrible," Ferris said. "All your fine reputation and lavish salary can't be much consolation when that ripping, tearing agony begins, can it?" "No, Harold, it isn't," Macklin admitted. "What does your project have to do with my headaches?" "Doctor," Mitchell said, "what would you say the most common complaint of man is?" "I would have said the common cold," Macklin replied, "but I suppose from what you have said you mean headaches." "Headaches," Mitchell agreed. "Everybody has them at some time in his life. Some people have them every day. Some are driven to suicide by their headaches." "Yes," Macklin said. pains," Mitchell said. "I see. Are you two saying you have headaches?" "We think we can," Ferris said. "There are a number of different causes for headaches—nervous strain, fatigue, physical diseases from kidney complaints to tumors, over-indulgence—but there is one effect of all of this, the one real cause of headaches," Mitchell announced. "We have definitely established this for this first time," Ferris added. "That's fine," Macklin said, sucking on his pipe. "And this effect that produces headaches is?" "The pressure effect caused by pituitrin in the brain," Mitchell said eagerly. "That is, the constriction of blood vessels in the telencephalon section of the frontal lobes. It's caused by an over-production of the pituitary gland. We have artificially bred a virus that feeds on pituitrin." "That may mean the end of headaches, but I would think it would mean the end of the race as well," Macklin said. "In certain areas it is valuable to have a constriction of blood vessels." works, I could stop using that damned gynergen, couldn't I? The stuff makes me violently sick to my stomach. But it's better than the migraine. How should I go about removing my curse?" He reinserted the pipe. "I assure you, you can forget ergotamine tartrate," Ferris said. "Our ' no means another attack of migraine. The drilling, grinding pain through my temples and around my eyeballs. The flashes of light, the rioting pools of color playing on the back of my lids. Ugh." nausea, eh? The pain of that turns you almost wrong side out, doesn't it? You aren't much better off with it than without, are you? I've heard some say they preferred the migraine." tend it in a worn leather case. "Tell me," he said, "what is the worst "When your heart stops, your blood pressure goes to its lowest point," Mitchell said. A dew of perspiration had bloomed on Macklin's forehead. "Is there much migraine. You do." he? By established periodic cycle he should be suffering hell right now, shouldn't he? But thanks to our treatment he is perfectly happy, with no unfortunate side effects such as gynergen produces." "It's a significant test case, yes. But not enough to go to the heroin." "That's absurd. What makes you think a thing like that?" "The—trance he's in now." husband for a full day. The effects of a narcotic would have worn off by this time." "Most known narcotics," she admitted, "but evidently you have was stomping up and down punching his fingers through the wire, worrying the lock on the cage. "Jerry is a great deal more active than Dean," Mitchell said. "Yes, but Dean isn't sick. He just doesn't seem to have as much nervous energy to burn up. Nothing wrong with his thyroid either." They went to the smaller cages. They found the situation with the rats, Bud and Lou, much the same. "I don't know. Maybe they just have tired blood," Mitchell ventured. "Iron deficiency anemia?" "Never mind, doctor. It was a form of humor. I think we had better see Under Mitchell's thumb the bell chimbed dum-de-de-dum-dum-dum . "Not a thing," Sidney said. "He's the healthiest, happiest, most Ferris nodded. "We made a slight miscalculation. It appears as if the virus colony overcontrols the supply of posterior pituitary extract in the cerebrum. It isn't more than necessary to stop headaches. But that necessary amount of control to stop pain is too much to allow the brain cells to function properly." "Why won't they function?" Carson roared. "They don't get enough food—blood, oxygen, hemoglobin," Ferris explained. "The cerebral vessels don't contract enough to pump the blood through the brain as fast and as hard as is needed. The brain cells remain sluggish, dormant. Perhaps decaying." The colonel yelled. Mitchell groaned. He was abruptly sure Ferris was correct. been saying and I don't like it." " With my headaches, like before?" Mitchell coughed into his fist for an instant, to give him time to frame an answer. "Unfortunately, yes. Apparently if your mind functions properly once again you will have the headaches again. Our research is a dismal failure." "I wouldn't go that far," Ferris remarked cheerfully. state. I can remember what it was like. Always worrying, worrying, worrying." "You mean wondering," Mitchell said. Macklin nodded. "Troubled, anyway. Disturbed by every little thing. peaceful this way. My head doesn't hurt. I've got a good-looking wife and all the money I need. I've got it made. Why worry?" order overruling your husband's wishes." She smoothed an eyebrow with the third finger of her right hand. "That was my original thought. But I've redecided." he's certified incompetent, authorities can rule whether Mitchell and Ferris' antitoxin treatment is the best method of restoring Dr. Macklin to sanity." "Because, Colonel, the matter of my husband's health, his very life, is involved." "Maybe," Carson said. "I don't know. I don't know what the hell to tell the Pentagon. I think I'll go out and get drunk."

<question>:
From the passage, what is said to be the most common complaint of man?

<options>:
A sinus infections
B headaches
C The common cold
D lack of sleep

<answer>:

B