Iknow how to simplify rational expressions but i can't answer this

- explain how a rational expression is simplified when multiplying two rational expressions.

Completely factor both the numerators and denominators of all fractions.
then Cancel or reduce the fractions. Remember that to reduce fractions; you can cancel something in the numerator with something in the denominator, but in order to cancel something in the numerator and denominator the two factors must be EXACTLY the same.

next Rewrite the remaining factor. Notice that you do NOT need to actually multiply anything in the numerator or denominator.

The answer is a because i went through all the other ones that it didn’t come out right