If a and b are positive integers such that a – b and <if>a/b are both even integers, which of the following must be an odd integer?
A: a/2
B: b/2
C: (a+b)/2
D: (a+2)/2
E: (b+2)/2
OA is D. Please explain with steps.
A: a/2
B: b/2
C: (a+b)/2
D: (a+2)/2
E: (b+2)/2
OA is D. Please explain with steps.
