Question

Why are astrologers not considered to be scientists?

Answer 1

The answer is:  [C]:  "Astrologers do not use the scientific method." 
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Note:  Choice [A] is incorrect.  Astrologers do use tools.
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Choice [B] is incorrect.  Some astrologers do observe the universe.
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Choice [D] is incorrect.  Astrologers may or may not go to college; and whether or not they do or do not is irrelevant as regard to whether to they are considered "scientists".
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Answer 2

Answer:

Astrologers do not use the scientific method.

I would say, astrologers do not use methods that are accepted as a scientifical at this moment. Scientific methods (especially experiments) are not possible in a field of astrology, because there are too many variables to control. But, actually, psychoanalysis also des not meet scientific conditions.