If a^2bc^2 = b^3, which of the following must be true?

If a^2bc^2 = b^3 , which of the following must be true? I. ac = b^2 II. b = 0 III. a^2c^2 = 1

Its source gives only the correct option, without the working.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #50130