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题库 / Prep2007E2-DS-39
If c and d are integers, is c even?
(1) c(d + 1) is even.
(2) (c + 2)(d + 4) is even.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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c和d的奇偶性都要确定！因为但凡有偶数 两数相乘即为偶数！
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