Choose the Polynomial That Is Described $3 r ^ { 2 } + 4 t - 9$

Multiple Choice

Choose the polynomial that is described.
-A trinomial in one variable of degree 3

A) $3 r ^ { 2 } + 4 t - 9$
B) $4 r ^ { 2 } - 9 t + 7$
C) $4 r ^ { 3 }$
D) $4 r ^ { 3 } - 9 t + 7$