Which of the following functions has a factor of x + 1?
A. f(x)= x³ - 13x² + 44x − 32
B. f(x) = x³ - 11x²+20x+32
C. f(x) = x³ - 11x² + 20x + 33
D. f(x) = x³ - 13x² + 44x − 33