If k and y are integers, and 10k + y is odd , which of the following must be true?	Choose the correct choice from the following answers:
A) k is odd
B) k is even
C) y is odd integer
D) y is even
E) both k and y are odd
10k will be always even as 10 has 2 as one of its factors   if 10k+y is odd, then the only possible explanation is that y is odd   correct answer y is odd integer
<result>C</result>
If k and y are integers, and 10k + y is odd , which of the following must be true?