What is the quotient of (x3−1)÷(x2+x+1)(x^3 - 1) \div (x^2 + x + 1)(x3−1)÷(x2+x+1)?
x−1x-1x−1
x+1x+1x+1
x2−1x^2-1x2−1
x2+1x^2+1x2+1