Find the Degree of the Polynomial and Indicate Whether the Polynomial

Multiple Choice

Find the degree of the polynomial and indicate whether the polynomial is a monomial, binomial, trinomial, or none of
these.
- $$9 x ^ { 3 } + 16 x ^ { 4 } + 9 x ^ { 2 } + 9$$

A) trinomial of degree 4
B) degree 4 ; none of these
C) degree 3 ; none of these
D) trinomial of degree 3