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

<passage>:
"To celebrate," Ferris said. The colonel shrugged. "That's as good a reason as any." On the street, Mitchell watched the two men go off together in bewilderment. IV "Do you think we'll have to use force on Macklin to get him to cooperate in the experiment?" Ferris asked eagerly. "How are you going to go about forcing him, Doctor?" Mitchell inquired. "He outweighs you by fifty pounds and you needn't look to against that repatriated fullback." Ferris fingered the collar of his starched lab smock. "Guess I got carried away for a moment. But Macklin is exactly what we need for a quick, dramatic test. We've had it if he turns us down." "I know," Mitchell said, exhaling deeply. "Somehow the men with the money just can't seem to understand basic research. Who would have "When we prove our results that should be of enough practical value for anyone. But those crummy trustees didn't even leave us enough for a field test." Ferris scrubbed his thin hand over the bony ridge of his "Oh, you want to know if my wife is around. No, she's asleep. That Army of all headaches." Mitchell's blue eyes narrowed and his boyish face took on an expression of demonic intensity. "Ferris, would you consider—?" "No!" the smaller man yelled. "You can't expect me to violate forehead. "I've been worrying so much about this I've got the ancestor "If you say so. But I don't guess I can come anyway. The Army is around the campus. Ferris paced off the tidy measurements of the office outside the laboratory in the biology building. Mitchell sat slumped in the chair behind the blond imitation wood desk, watching him disinterestedly. "Do you suppose the Great Man will actually show up?" Ferris demanded, pausing in mid-stride. "I imagine he will," Mitchell said. "Macklin's always seemed a decent this campus treats biologists like dirt. Sometimes I want to bash in their smug faces." Sometimes, Mitchell reflected, Ferris displayed a certain lack of scientific detachment. There came a discreet knock on the door. "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 "But think," Ferris interjected, "what a boon it would be if everyone could be cured of headaches of all of this, the one real cause of headaches," Mitchell announced. "We have definitely established this for this first time," Ferris added. "Certainly it has," Ferris said. "On rats, on chimps...." "But not on humans?" Macklin asked. "Not yet," Mitchell admitted. "We want you," Ferris told him. Macklin coughed. "I don't want to overestimate my value but the government wouldn't like it very well if I died in the middle of this project. My wife would like it even less." Ferris turned his back on the mathematician. Mitchell could see him mouthing the word yellow "Doctor," Mitchell said quickly, "I know it's a tremendous favor to ask of a man of your position. But you can understand our problem. Unless we can produce quick, conclusive and dramatic proof of our All our test animals survived and seem perfectly happy and contented. As I said, the virus is self-stabilizing. Ferris and I are confident that there is no danger.... But we may be wrong." Macklin held his head in both hands. "Why did you two select "You're an important man, doctor," Ferris said. "Nobody would care if Mitchell or I cured ourselves of headaches—they might not even believe us if we said we did. But the proper authorities will believe a man "Yes, I do," Macklin said. "Very well. Go ahead. Give me your injection." Mitchell cleared his throat. "Are you positive, doctor?" he asked uncertainly. "Perhaps you would like a few days to think it over." "No! I'm ready. Go ahead, right now." II "Ferris!" Mitchell yelled, slamming the laboratory door behind him. "Right here," the small man said briskly. He was sitting at a work table, penciling notes. "I've been expecting you." newspapers," Mitchell said. He tapped the back of his hand against the folded paper. "On the contrary, I should and I did," Ferris answered. "We wanted something dramatic to show to the trustees and here it is." "Yes, we wanted to show our proof to the trustees—but not broadcast unverified results to the press. It's too early for that!" "Don't be so stuffy and conservative, Mitchell! Macklin's cured, isn't "But—" The shrill call of the telephone interrupted Mitchell's objections. Ferris excused himself and crossed to the instrument. He answered it Mitchell dropped the receiver heavily. "What could be wrong with Macklin?" he asked without removing his hand from the telephone. Ferris frowned, making quotation marks above his nose. "Let's have a look at the test animals." Together they marched over to the cages and peered through the Under Mitchell's thumb the bell chimbed dum-de-de-dum-dum-dum . As they waited Mitchell glanced at Ferris. He seemed completely undisturbed, perhaps slightly curious. The door unlatched and swung back. is anything wrong with your husband. This is Dr. Ferris. I am Dr. Mitchell." The Army officer came out into the hall to meet them. that happens to him. The Army doesn't like what you have done to him." Mitchell wondered desperately just what they had done to the man. "Can we see him?" Mitchell asked. "Why not? You can't do much worse than murder him now. That might be just as well. We have laws to cover that." "How is he different?" Mitchell demanded. The medic examined Mitchell and Ferris critically before answering. "He used to be a mathematical genius." "And now?" Mitchell said impatiently. Mitchell tried to stop Colonel Sidney as he went past, but the doctor mumbled he had a report to make. Mitchell and Ferris stared at Colonel Carson and Macklin and at each other. Ferris followed them docilely. "What have you done to him?" the colonel asked straightforwardly. "We merely cured him of his headaches," Mitchell said. "I think I can explain," Ferris interrupted. "You can?" Mitchell said. Ferris nodded. "We made a slight miscalculation. It appears as if the 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 Mitchell groaned. He was abruptly sure Ferris was correct. The colonel drew himself to attention, fists trembling at his sides. "I'll see you hung for treason! Don't you know what Elliot Macklin properly once again you will have the headaches again. Our research is a dismal failure." "I wouldn't go that far," Ferris remarked cheerfully. Mitchell was about to ask his associate what he meant when he saw Macklin slowly shaking his head. treatment. He wants to remain in his state of lower intelligence." She nodded. "If those are his wishes, I can't go against them." "But Mrs. Macklin!" Mitchell protested. "You will have to get a court order overruling your husband's wishes." Ferris' antitoxin treatment is the best method of restoring Dr. Macklin to sanity." "I doubt very much if the court would rule in that manner," she said. the Pentagon. I think I'll go out and get drunk." "I'll go with you," Ferris said. Mitchell glanced sharply at the little biologist. Carson squinted. "Any particular reason, doctor?"

<question>:
Why does the army get involved with the situation?

<options>:
A Macklin is a valuable asset to them, and they don't want something to happen to his intellect.
B The army is investigating Mitchell and Ferris because they gave unauthorized medical assistance.
C Mrs. Macklin called them in to help.
D They want to see the results of Ferris and Mitchell's trial.

<answer>:

A