xyz is consecutive integers,is x a even?

a.xz is a even number

b.xyz is divisible by 4

the answer is A.

But my quesiton is that what is x=-4,y=-3,z=-2,the figures can fulfill the premise a but X is not a even?????

Should I concern the positive/negative interger????

如果考虑负整数，那么我的问题是，偶数是不是也分正负？

如果有负偶数，那么此题答案还是A。所举例子中x＝-4为“负偶数”。

刚查了一下偶数的定义，没有说不存在“负偶数”。