Answer:
A
Explanation:
Writing a polynomial in standard form involves arranging all the terms with the highest powered term first 
In the given expression, the highest powered term is 
 , so that would come first, and then
, so that would come first, and then 

So we can write:

A binomial is when there are 2 terms in the polynomial and a monomial is when there is 1 term. 
Clearly we see that this has 2 terms and hence a binomial.
Answer choice A is correct.