If n is an integer greater than 6, which of the following must be divisible by 3?
求解答 为啥是A！
If n is an integer greater than 6, which of the following must be divisible by 3?
A
n (n+1) (n-4)
B
n (n+2) (n-1)
C
n (n+3) (n-5)
D
n (n+4) (n-2)
E
n (n+5) (n-6)
