23. S is a set of integers such thatI) If x is in S, then −x is in S.II) ... ...

S is a set of integers such that

I) If x is in S, then −x is in S.

II) If both x and y are in S, then so is x + y.

Is −2 in S?

(1) 1 is in S.

(2) 0 is in S.


(A) if statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient;
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set C - More Practice