All possible values of xx

If 13!2x\dfrac{13!}{2^x} is an integer, which of the following represents all possible values of x?x? (where x x is a non-negative integer).

A. 0x100 \le x \le 10.
B. 0x90 \le x \le 9.
C. 0x<100 \le x < 10.
D. 1x101 \le x \le 10.
E. 1<x<10 1 < x <10.

Notation: !! is the factorial notation. For example, 8!=1×2×3××88! = 1\times2\times3\times\cdots\times8 .


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