Find All Rational Zeros $$f ( x ) = x ^ { 4 } + 2 x ^ { 3 } + 2 x ^ { 2 } - 4 x - 8$$

Multiple Choice

Find all rational zeros.
- $$f ( x ) = x ^ { 4 } + 2 x ^ { 3 } + 2 x ^ { 2 } - 4 x - 8$$

A) $- 2 , - 3$
B) $2 , - 1$
C) $- 2,2$
D) No rational zeros