Find the Degree of the Following Polynomial and Determine Whether $21 x y z + 25 x ^ { 2 } z - 9 y ^ { 2 } z ^ { 3 } + 5 x y - x ^ { 2 } y ^ { 2 } z ^ { 2 }$

Multiple Choice

Find the degree of the following polynomial and determine whether it is a monomial, binomial, trinomial, or none of
these.
- $21 x y z + 25 x ^ { 2 } z - 9 y ^ { 2 } z ^ { 3 } + 5 x y - x ^ { 2 } y ^ { 2 } z ^ { 2 }$

A) 5; none of these
B) 6; trinomial
C) 1; trinomial
D) 6; none of these