Use the Rational Root Theorem and the Factor Theorem to Help

Multiple Choice

Use the rational root theorem and the factor theorem to help solve the equation. x ³ - 3 x ² + x - 3 = 0

A) $\{ 3 , \pm i \}$
B) $\{ 3,3 , \pm i \}$
C) $\{ 2 , \pm i \}$
D) $\{ 2,3 , \pm i \}$
E) $\{ 4 , \pm 2 i \}$