If x=0.rstu, where r, s, t, and u each represent a nonzero digit of x, what is the value of x ?()
(1)r=3s=2t=6u
(2)The product of r and u is equal to the product of s and t.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.