Complete the square for the expression. Write the resulting expression as a binomial squared.

x^2 + 4x + ___

Ax^2 + 4x + 4 = (x + 4)^2

Bx^2 + 4x + 16 = (x + 2)^2

Cx^2 + 4x + 4 = (x + 2)^2

Dx^2 + 4x + 16 = (x + 4)^2