If \(a\) is a positive integer, then which of the following must be true of \((a-1)(a)(a+1)?\)

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If \(a\) is a positive integer, then which of the following must be true of \((a-1)(a)(a+1)?\)

I. It is always divisible by \(3\)
II. It is always divisible by \(4\)
III. It is non-prime

A. I only
B. II only
C. III only
D. I and III only
E. I, II, and III

OA D
Source: — Problem Solving |