GAUSS8 1999 Problem 13

Past Contests GAUSS8 GAUSS (GR. 8) - 1999
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1

The expression n! means the product of the positive integers from 1 to n. For example, 5!=1\times2\times3\times4\times5. The value of 6!-4! is

Answer Choices
A. 2
B. 18
C. 30
D. 716
E. 696