Solve the Equation in the Real Number System $$x ^ { 3 } + 8 x ^ { 2 } - 18 x + 20 = 0$$

Solve the equation in the real number system.
- $$x ^ { 3 } + 8 x ^ { 2 } - 18 x + 20 = 0$$

A) {1}
B) {10}
C) {-10, 10}
D) {-10}