Determine the Number of Zeros of the Polynomial Function Below $f ( x ) = 9 + x ^ { 2 } - 7 x ^ { 5 } + 7 x ^ { 7 }$

Multiple Choice

Determine the number of zeros of the polynomial function below. $f ( x ) = 9 + x ^ { 2 } - 7 x ^ { 5 } + 7 x ^ { 7 }$

A) 6
B) 8
C) 3
D) 7
E) 5