Which one of the following options is true when considering the expansion of the binomial expression (x+y)4?

A. The last term of the expansion of (x+y)4 is y4.

B. The coefficients of the expansion of (x + y)4 are: 1, 4, 4, 1.

C. The expansion of (x + y)4 will yield 4 terms.

D. The sum of the exponents of each term of the expansion of (x + y)4 is 5.