GWD27-32

        

Q32:

        

If x³y⁴
= 5,000, is y = 5?

        

(1)
                  y is a positive integer.

        

(2)
                  x is an integer.

        

              

        

A. Statement (1) ALONE
is sufficient, but statement (2) alone is not sufficient.

        

B. Statement (2) ALONE
is sufficient, but statement (1) alone is not sufficient.

        

C. BOTH statements
TOGETHER are sufficient, but NEITHER statement ALONE is
sufficient.

        

D. EACH
statement ALONE is sufficient.

        

E. Statements (1)
and (2) TOGETHER are NOT sufficient.

        

我的问题是为什么是 C呢， A 就足够了吧， 当A是整数的时候，它的4次方也是整数，