Explanation

We know \(\frac{sum}{# of #s} = average\).

We know from List S: —25, —10, 0, 10, 25

Sum of the list S = 0.

Answer choices (A), (B), and (D) have similar patterns, so the average of these three answer choices is also 0. The sum of choice (C) will be –10, so the average is –2.

Hence options A, B and D are correct.
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Bump

Process
1. Recognize that the list is "symmetrical" about 0. In such a list, the average will be 0.
2. All the lists have 0 at their center and the same format, so we can just check to make sure they share the same symmetry of terms and we'll be good.

A, B, and D fit the bill!