Find All Real Zeros (Estimate the Irrational Zeros to the Nearest

Multiple Choice

Find all real zeros (estimate the irrational zeros to the nearest hundredth) .
- $f ( x ) = x ^ { 4 } + 7 x ^ { 3 } - 7 x ^ { 2 } - 63 x - 18$

A) 0.30, -6.70
B) 3, -3, -0.30, -6.70
C) 3, -3, 0.30, -6.70
D) 9, -9, -0.30, -6.70