Which of the following MUST yield an integer when divided by 9?  Choose the correct choice from the following choices:
A) The sum of nine consecutive positive integers.
B) The square of a prime number.
C) The sum of two odd integers.
D) The product of three consecutive odd numbers.
E) The difference between a multiple of 8 and a multiple of 3.
For option A: Let the numbers be (x-4), (x-3), (x-2), (x-1), (x), (x+1), (x+2), (x+3), (x+4).   Now, (x-4)+(x-3)+(x-2)+(x-1) + (x) + (x+1) + (x+2)+(x+3)+(x+4) = 9(x). Hence A is true. No need to check other answers since there can only be one correct answer.   So, The sum of nine consecutive positive integers.ns(The sum of nine consecutive positive integers.)
<result>A</result>
Which of the following MUST yield an integer when divided by 9?