Select the equation that is true for all values of x?
A. (x + 4)2 = x2 + 16
B. (4x + 16)2 = 16(x + 4)2
C. (x + 4)(x + 4) = (x + 16)2
D. (x – 4)(x + 4) = x2 – 8x + 16