Remark
The distributive property works with 2 terms inside brackets and 1 term outside, or a common factor from 2 terms being taken out of both terms and put outside a set of brackts.
A is incorrect.
There is no multiplication in this operation at all anywhere. B is incorrect.
The commutative property says that a + b = b + a which is true in most math systems but that is not what happened here. C is not correct.
D is addition all right, but the signs are opposite. I would pick this as an answer, but hold your nose doing it.
