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Set T consists of a certain number of even integers divisible by 3. Is standard deviation of T positive?

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Set T consists of a certain number of even integers divisible by 3. Is standard deviation of T positive?

(1) All elements of set T are positive.

(2) The range of set T is 0.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Official Answer
1Comments
According to me the answer should be D. Not clear about B as the correct answer choice.

Any explanations for this?
commented Jun 27, 2015 by Beginner (23 points)

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