The product of two factors is 1. One of the factors is 1. Can you tell what the other factor is?
A. Yes; the other factor is 0 since 0 × 1 = 1.
B. Yes; the other factor is 1 since 1 × 1 = 1.
C. No; any number times 0 is 0, so there is no way to know what the other factor is.
D. No; any number times 1 is 1, so there is no way to know what the other factor is.