Choose the polynomial that is written in standard form. (1 point)−3x5y2 + 4x3y + 10x2−8xy2 + 4x4y2 + 3x3x4y2 + 4x3y5 + 10x4x6y2 + 4x3y8 + 10x7

Standard form is where the degree of each monomial decreases from left to right. Degree can be found by adding the exponents on each variable.

The only one where this is true is the first one.
The degree goes from 7 to 4 to 2