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

<passage>:
An interview with Dr. I. M. Niemand, Director of the Psychophysical Association for the Advancement of Science in New York, Dr. Niemand Niemand by Philip Latham. LATHAM. Dr. Niemand, what would you say is your main job? NIEMAND. I suppose you might say my main job today is to find out all I NIEMAND. The number of spots on the Sun rises and falls in a cycle of NIEMAND. It means you can only approximately predict the future course NIEMAND. Scores of them. NIEMAND. Pure bosh in most cases. NIEMAND. A few. There is unquestionably a correlation between LATHAM. Now, Dr. Niemand, I understand that you have been investigating NIEMAND. Yes, I suppose some people would say so. NIEMAND. That's true. a conspicuous symptom of the disease. Whereas the real cause is an NIEMAND. We had to call them something. Named after the Sun, I suppose. NIEMAND. It is quite invisible to the eye but readily detected by NIEMAND. Well, they're common enough, goodness knows. As old as the LATHAM. Can you give us a general idea? NIEMAND. I'll try. Let's see ... remember that speech from "Julius NIEMAND. Well, Shakespeare would have been nearer the truth if he had NIEMAND. That's right, in the Sun. I suppose the oldest problem in the mind to solve. Generally they have concluded that man is inherently LATHAM. But weren't there reasons? NIEMAND. What reasons? NIEMAND. Nonsense. Men always make some flimsy excuse for going to war. specific? NIEMAND. Perhaps I'd better go back to the beginning. Let me see.... It all started back in March, 1955, when I started getting patients suffering from a complex of symptoms, such as profound mental depression, anxiety, insomnia, alternating with fits of violent rage and resentment against life and the world in general. These people were deeply disturbed. No doubt about that. Yet they were not psychotic and hardly more than mildly neurotic. Now every doctor gets a good many fit into this picture. They were married and single persons of both sexes and of all ages. They came from all walks of life. The onset of LATHAM. Aren't such attacks characteristic of the stress and strain of NIEMAND. I'm afraid that old stress-and-strain theory has been badly overworked. Been hearing about it ever since I was a pre-med student at ucla . Even as a boy I can remember my grandfather deploring the stress and strain of modern life when he was a country doctor practicing in Latham, it's time the stress-and-strain theory was relegated to the junk pile along with demoniac possession and blood letting. LATHAM. You must have done something for your patients— NIEMAND. A doctor must always do something for the patients who come to his office seeking help. First I gave them a thorough physical examination. I turned up some minor ailments—a slight heart murmur or a inquiry into their personal life. Here again I drew a blank. They had no particular financial worries. Their sex life was generally satisfactory. There was no history of mental illness in the family. In fact, the only NIEMAND. Oh, yes. In a few cases in which I tried tranquilizing pills of of carrying on the practice of medicine. The only thing for which I do give myself credit was that I asked my patients to keep a detailed LATHAM. And this gave you a clue? NIEMAND. It was the beginning. In most instances patients reported the Another that he felt the people around him were plotting his fear she would injure the children. I pored over these case histories NIEMAND. The first thing that struck me was that the attacks all NIEMAND. Total strangers miles apart were stricken at almost the same do with it. There is some evidence that mental patients are most NIEMAND. Naturally I said nothing of this to my patients. I did, occurred to me: if people a few miles apart could be stricken simultaneously, why not people hundreds or thousands of miles apart? It was this idea that prompted me to get in touch with an old colleague of mine I had known at UC medical school, Dr. Max Hillyard, who was in practice in Utica, New York. LATHAM. With what result? NIEMAND. I was afraid the result would be that my old roommate would on receiving an answer by return mail to the effect that he also had been getting an increasing number of patients suffering with the same identical symptoms as my own. Furthermore, upon exchanging records we did find that in many cases patients three thousand miles apart had been stricken simultaneously— NIEMAND. We say an attack is simultaneous when one occurred on the east NIEMAND. In every case of a simultaneous attack the Sun was shining at NIEMAND. No, no. The weather had nothing to do with it. I mean the Sun set. Dr. Hillyard and I had been searching desperately for a clue. We NIEMAND. It certainly did. It looked as if we were headed back to the the consequences. Here luck played somewhat of a part, for Hillyard happened to have a contact that proved invaluable to us. Several years before Hillyard had gotten to know a young astrophysicist, Henry Middletown, who had come to him suffering from a severe case of myositis in the arms and shoulders. Hillyard had been able to effect a complete cure for which the boy was very grateful, and they had kept up a desultory correspondence. Middletown was now specializing in radio LATHAM. In what way was Middletown of assistance? NIEMAND. It was the old case of workers in one field of science being surprise he heard our story with the closest attention. I guess astronomers have gotten so used to hearing from flying saucer enthusiasts and science-fiction addicts that nothing surprises them any more. When we had finished he asked to see our records. Hillyard had NIEMAND. It was really quite simple. But if it had not been for NIEMAND. I said that the lines drawn down through the days of greatest LATHAM. Why is that so important? NIEMAND. Middletown was immediately struck by the resemblance between the chart of mental disturbance and one he had been plotting over the NIEMAND. The S-Regions are invisible to the eye through an radio telescope. Middletown had discovered them when he was a graduate student working on radio astronomy in Australia, and he had followed up his researches with the NIEMAND. Very closely. You see it takes about twelve days for an NIEMAND. Apparently an S-Region is not particularly effective when it is NIEMAND. They are connected in this way: that sunspot activity and NIEMAND. We don't account for it. NIEMAND. Middletown says that the radio waves emanating from them are LATHAM. Does this mean that the mental disturbances arise from some form NIEMAND. Our latest results indicate that probably NIEMAND. Because the radio exploration of the Sun only began since the end of World War II. LATHAM. How does it happen that you only got patients suffering from NIEMAND. I think we did get such patients previously but not in large NIEMAND. I'm afraid the only sure way is to keep on the unilluminated entire continent. Hillyard and Middletown are working on some form of NIEMAND. At the present moment there happens to be no S-Region activity LATHAM. And so you believe that the S-Regions are the cause of most of NIEMAND. That is the logical outcome of our investigation. We are NIEMAND. The trouble is they seem to develop at random on the Sun. I'm NIEMAND. If you have a feeling of restlessness and anxiety, if you are

<question>:
Which of these is the most important reason Dr. Niemand contacted Dr. Hillyard specifically?

<options>:
A Dr. Hillyard is located on the east coast
B Dr. Niemand wanted to see if this was happening in other parts of California
C They were old roommates, so Dr. Niemand could trust him with his theory
D They were friends from medical school

<answer>:

A