Answer
Explanation
A polynomial with one term is called a monomial
A polynomial with two terms is called a binomial
A polynomial with three terms is called a trinomial
In consequence,
Given that we are looking for a binomial, then the first and second choices are discarded.
The degree of a polynomial is the highest exponent of the x-terms. And the leading coefficient is the coefficient (the number) next to the variable with the highest exponent. Therefore,