Determine Whether the Expression Is a Polynomial $- 10 a ^ { 2 }$

Multiple Choice

Determine whether the expression is a polynomial. If the expression is a polynomial, state whether it is a monomial,
binomial, or trinomial. If the expression is not a polynomial, indicate why not.
- $- 10 a ^ { 2 }$

A) monomial
B) trinomial
C) not polynomial, lacks other terms
D) binomial