Answer:
The correct answer is
C. 4
Explanation:
The given polynomial is
![-4x^4](https://img.qammunity.org/2020/formulas/mathematics/high-school/pctvpobsbl9nc5u1egxk0ao8jra6f7fyrj.png)
The degree of the polynomial is the highest exponent which is 4.
The -4 is called the leading coefficient.
This polynomial has only one term so it is a monomial.
The correct answer is option C.