Product of Rational Expressions (variable a)

Expressions in the numerators and denominators of the product below are labeled V, W, X, and Y, while Z represents the product written as a single rational expression.

This question has two parts. First, answer Part 1. Then, answer Part 2.
from "Product of Rational Expressions (variable a)"

Part 1

Identify the two expressions in this product that have a common binomial factor.
from "Product of Rational Expressions (variable a)"

Part 2

Which is true of this binomial factor?
A.
It must be a factor of the numerator of Z.
B.
It must be a factor of the denominator of Z.
C.
It must be a factor of the numerator of Z and a factor of the denominator of Z.
D.
It is possible that it is neither a factor of the numerator of Z nor a factor of the denominator of Z.