If c is an integer greater than 6, which of the following must be divisible by 3?	Choose the correct choice from the following options:
A) c (c+4) (c-2)  B) c (c+2) (c-1)  C) c (c+3) (c-5)  D) c (c+1) (c-4)  E) c (c+5) (c-6)
anything in the form of (c-1) (c) (c+1) is divisible by 3. in other word, a product of any 3 consecutive intevers is divisible by 3.   c (c+1) (c-4) = c (c+1) ((c-1)-3) is equivalant to (c-1) (c) (c+1)   c (c+2) (c-1) is equivalant to (c+1) missing.   c (c+3) (c-5) is equivalant to (c-1) missing and c repeating.   c (c+4) (c-2) is equivalant to odd/even consqcutive integers   c (c+5) (c-6) is equivalant to (c+1) missing and c repeating.   Answer : c (c+1) (c-4)
<result>D</result>
If c is an integer greater than 6, which of the following must be divisible by 3?