What is the completely factored form of f(x) = x3 – 2x2 – 5x + 6?

A. f(x) = (x + 2)(x – 3)(x + 6)
B. f(x) = (x + 2)(x – 3)(x – 6)
C. f(x) = (x – 2)(x + 3)(x – 1)
D. f(x) = (x + 2)(x – 3)(x – 1)