State Whether the Function Is a Polynomial Function or Not $f ( x ) = - 14 x ^ { 3 } + 9 x ^ { 2 } - 7$

Multiple Choice

State whether the function is a polynomial function or not. If it is, give its degree. If it is not, tell why not.
- $f ( x ) = - 14 x ^ { 3 } + 9 x ^ { 2 } - 7$

A) Yes; degree 6
B) Yes; degree 5
C) Yes; degree 3
D) No; the last term has no variable