Number Systems -Odds & Evens

[sukhman]

If a , b, and c are integers and ab^2 / c is a positive even integer, which of the following must be true? I. ab is even II. ab > 0 III. c is even

I only II only I and II I and III I, II, and III

[Brent@GMATPrepNow]

If a , b, and c are integers and ab2 / c is a positive even integer, which of the following must be true? I. ab is even II. ab > 0 III. c is even

I only II only I and II I and III I, II, and III

I think you need to take some time to carefully review your posts to ensure that they don't contain confusing information and/or answer choices.
I get the impression that you're simply copying and pasting questions without taking a moment to see if they result in meaningful/unambiguous questions.

Cheers,
Brent