Correct Answer: C
Explanation:
Statement (1) tells us nothing about the prime factors of y, so it is not sufficient on its own.
We can eliminate B, C, and E. We do know at this point, though, that the set of prime factors in
question is {2, 3, 5}.
Statement (2) on its own tells us nothing about the prime factors of x, so it is not sufficient on its
own. We can eliminate B.
Putting them together, we can see that all of the prime factors of x would also be prime factors of y,
so they have those same three prime factors in common. Since the statements are sufficient
together, then answer is C.