If f(1) = 0, What are all the roots of the function f(x) = x³ - 3x² - x - 3? Use the remainder theorem.
1) x = -1, x = 1, or x = 3
2) x = -3, x = -1, or x = 1
3) x = -3 or x = 1
4) x = -1 or x = 3