18! is equal to which of the following?	Pick one.
A) 6,402,373,705,728,125 B) 6,402,373,705,728,216 C) 6,402,373,705,728,624 D) 6,402,373,705,728,000 E) 6,402,373,705,728,989
After 4!, the units digit of every factorial is 0.   5!=120   6!=720   etc...   The answer is 6,402,373,705,728,000.
<result>D</result>
18! is equal to which of the following?