"When either of these tables is filled with data, a given ProfessorID will not be repeated for a given SectionID". I said (C) indeterminate but the answer was (A) true. After reading this over and over again, I finally figured out why the answer is A. I kept thinking that the question was asking simply whether or not a professorID will ever be repeated for any sectionID. That is indeterminate, because a professorID could repeat, but it also may not. However, I finally realized that the question was asking if there can ever be a combination of sectionID and professorID that repeats. That answer is clearly no, because sectionID uniquely defines a row. Tricky question. You got me.
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