Find All Complex Zeros of the Polynomial Function $f ( x ) = x ^ { 3 } + 7 x ^ { 2 } - 16 x + 18$

Multiple Choice

Find all complex zeros of the polynomial function. Give exact values. List multiple zeros as necessary.
- $f ( x ) = x ^ { 3 } + 7 x ^ { 2 } - 16 x + 18$

A) $1 + i , 1 - i , 9$
B) $1 + i , 1 - i , 9 i$
C) $1 + i , 1 - i , - 9$
D) $1 + i , - 9,9$