Identify the Polynomial as a Monomial, Binomial, Trinomial, or None $9 z ^ { 4 } + 2 z ^ { 3 } - 7 z ^ { 2 } + 9$

Multiple Choice

Identify the polynomial as a monomial, binomial, trinomial, or none of these.
- $9 z ^ { 4 } + 2 z ^ { 3 } - 7 z ^ { 2 } + 9$

A) Binomial
B) None of these
C) Monomial
D) Trinomial