Determine which of the following is a factor of P(x)=x3+x2−4x−4P(x) = x^3 + x^2 - 4x - 4P(x)=x3+x2−4x−4.
x−2x - 2x−2
x+3x + 3x+3
x−1x - 1x−1
x+4x + 4x+4