(.......) is an example of :?

For this case we have that by definition the distributive property establishes:
[tex](a + b) (c + d) = ac + ad + bc + bd[/tex]
We have the following expression:
[tex](y ^ 2 + y) (x ^ 4 + 3x ^ 3-2x ^ 3) =[/tex]
Applying the distributive property we have:
[tex]y ^ 2 (x ^ 4 + 3x ^ 3-2x ^ 3) + y (x ^ 4 + 3x ^ 3-2x ^ 3)[/tex]
So, the given example is an example of distributive property.
ANswer:
Option B