Find a Rational Zero of the Polynomial Function and Use $$f ( x ) = x ^ { 3 } - 8 x ^ { 2 } - x + 8$$

Multiple Choice

Find a rational zero of the polynomial function and use it to find all the zeros of the function.
- $$f ( x ) = x ^ { 3 } - 8 x ^ { 2 } - x + 8$$

A) $\{ 1 , - 1,8 \}$
B) $\{ - 1,2 , - 4 \}$
C) $\{ 1,2,4 \}$
D) $\{ 1 , - 1 , - 8 \}$