Solution:
A polynomial’s degree is the highest or the greatest power of a variable in a polynomial equation. The degree indicates the highest exponential power in the polynomial (ignoring the coefficients).
The polynomial is given below as

Rewrite the polynomial above, we will have

From the polynomial,
The leading term is

The image below shows a vivid explanation of the degree of a polynomial
Hence,
The degree of the polynomial is

Hence,
The final answer is OPTION C