Short Answer D
Remark
The answer you want must be factored down to prime factors, two of which are two 2s.
18 = 2 * 3 * 3 There is only one two in this so it is not going to be divisible by 4.
40 = 4 * 10 which = 10 when divided by 4
12 = 3 * 4 which = 3 when divided by 4
32 = 8 * 4 which = 8 when divided by 4 All these last 3 work. Only 18 does not.
