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.
- $$6 x ^ { 4 } - 8 x ^ { 4 } y - 5$$

A) degree 4 ; none of these
B) trinomial of degree 4
C) trinomial of degree 5
D) trinomial of degree 9