If x, y, and z are all factors of 45, which of the following must be true? Choose the correct answer.
A) The product xyz > 45
B) Either x = y, y = z, or x = z
C) x – y – z = even
D) The product xyz is odd
E) yz/x is an integer
All the factors of 45 are odd numbers.   The product of odd numbers is odd.   The answer is The product xyz is odd.
<result>D</result>
If x, y, and z are all factors of 45, which of the following must be true?