Find All Rational Zeros of the Polynomial Function $$f ( x ) = 3 x ^ { 4 } + 5 x ^ { 3 } - 10 x ^ { 2 } - 20 x - 8$$

Multiple Choice

Find all rational zeros of the polynomial function.
- $$f ( x ) = 3 x ^ { 4 } + 5 x ^ { 3 } - 10 x ^ { 2 } - 20 x - 8$$

A) $- 1 , \frac { 2 } { 3 } , 2 , - 2$
B) $1 , \frac { 2 } { 3 } , 2 , - 2$
C) $- 1 , - \frac { 2 } { 3 } , 2 , - 2$
D) $1 , - \frac { 2 } { 3 } , 2 , - 2$