一道GMAT数学题求解释啊！

imddung

If y is an integer and , is y = 0?

(1)x ＜ 0

(2)y＜ 1

• AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
• BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
• CBOTH statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
• DEACH statement ALONE is sufficient.
• EStatements (1) and (2) TOGETHER are NOT sufficient.

求解为什么答案是D    题目里没有说X是整数呀，那当x>0 时，也有可能x<1/2,那么y<1 就不是充分条件了呀？ 求解诶！

francoisw

y = |x| + x