If a and b are integers and (a*b)^5 = 128y, y could be:	Choose the most appropriate option
A) 1	B) 2	C) 4	D) 8	E) 16

Rationale: distribute the exponent . a ^ 5 * b ^ 5 = 128 y find the prime factorization of 96 . this is 2 ^ 5 * 2 ^ 2 . we need 2 ^ 3 ( or some other power of 2 that will give us a multiple of 2 ^ 5 as our second term ) . 2 ^ 3 = 8 the answer is d .
Answer: D