Answer:
B. FOIL
Explanation:
FOIL stands for Firsts, Outsides, Insides, and Lasts
This is a mnemonic to help you to remember how to multiply two binomials
From the image, we can see that the on the right side of the equals,
is the product of the firsts of the binomials
is the product of the outsides of the binomials
is the product of the insides of the binomials
is the product of the lasts of the binomials.