If r is an even integer and q is an odd integer, which of the following must be an odd integer?	Select:
A) r/q	B) rq	C) 2r+q	D) 2(r+q)	E) 3r/q
this is a must question:   A. r/q   can be a non-integer   B.rq   always even   C. 2r+q   2r = even -&gt; even+odd = odd   D. 2(r+q)   always even - r+q = odd *2 -&gt; even   E. 3r/q   might be a non integer.   2r+q
<result>C</result>
If r is an even integer and q is an odd integer, which of the following must be an odd integer?