All teachers in a school are certified. Some certified staff members coach football. Which statement must be true?
Answer and explanation
Correct answer: C. It cannot be concluded that any teacher coaches football; coaches may be other staff
- Step 1: Teachers are a subset of the certified staff; the football coaches are another subset of the certified staff. Step 2. The two subsets may or may not overlap, so no conclusion about teacher coaches is guaranteed. Answer: no conclusion about teachers coaching football follows. Why not the others: Each other option claims something definite about overlap that the two statements do not support.
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