Find All Solutions of the Equation $$x ^ { 3 } - 8 = 0$$

Find all solutions of the equation. Leave answers in trigonometric form.
- $$x ^ { 3 } - 8 = 0$$

A) $\left\{ 2,2 \operatorname { cis } 60 ^ { \circ } , 2 \operatorname { cis } 240 ^ { \circ } \right\}$
B) $\left\{ 2,2 \operatorname { cis } 60 ^ { \circ } , 2 \operatorname { cis } 300 ^ { \circ } \right\}$
C) $\left\{ 2,2 \operatorname { cis } 300 ^ { \circ } , 2 \operatorname { cis } 300 ^ { \circ } \right\}$
D) $\left\{ 2,2 \operatorname { cis } 120 ^ { \circ } , 2 \operatorname { cis } 240 ^ { \circ } \right\}$