If n is the greatest positive integer for which 2^n is a factor of 8!, then n =? Choose the most appropriate option:	A) 2	B) 4	C) 6	D) 8	E) 10
8! = 40320   E. 2^10 = 512 (40320/512) - this is not a factor of 8!   D. 2^8 = 256 (40320/256) - this is not a factor of 8!   C. 2^6 = 64 (720/64) - this is a factor of 8!   6 is answer
<result>C</result>
If n is the greatest positive integer for which 2^n is a factor of 8!, then n =?