Marc squared the expression 4x + 5y as 16x² + 25y², which of the following is correct with the answer of your classmate?

A. The answer is correct because to square a binomial distribute the exponent.
B. The answer is wrong because the product of squaring a binomial is a trinomial.
C. The answer is correct because the product of squaring a binomial is another binomial.
D. The answer is wrong because to square a binomial is to multiply the expression by 2.​