If s and t are integers and s^2 – t^2 is an…

If s and t are integers and s^2 – t^2 is an odd integer, which of the following must be an even integer? I. s + t + 2 II. s^2 + 2st + t^2 III. s^2 + t^2

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #72763