Which of the following is the complete factorization of the polynomial below?
x^3 - 7x^2 + 7x + 15
A. (x - 1)(x-3)(x-5)
B. (x + 1)(x+3)(x+5)
C. (x + 1)(x-3)(x-5)
D. (x-1)(x+3)(x+5)