Determine Whether the Expression Is a Monomial $$- 4 x ^ { 3 } y ^ { 6 }$$

Multiple Choice

Determine whether the expression is a monomial. If it is a monomial, state the coefficient and degree.
- $$- 4 x ^ { 3 } y ^ { 6 }$$

A) monomial; coefficient -4; degree 9
B) not a monomial
C) monomial; coefficient -4; degree 6
D) monomial; coefficient -4; degree 3