Find All Rational, Irrational, and Complex Zeros $P ( x ) = x ^ { 4 } - 81$

Multiple Choice

Find all rational, irrational, and complex zeros. $P ( x ) = x ^ { 4 } - 81$

A) $\{ - 3,3 , - 3 i , 3 i \}$
B) $\{ - 3,3 \}$
C) $\{ 3 \}$
D) $( - 3 i , 3 i \}$
E) $\{ - 9,9 , - 3 i , 3 i \}$