Answer:
B.
Explanation:
We are given:

And we want to select its equivalent form.
Note that A is not valid. No integration property allows us to separate factors unless that factor is a constant.
We can simply rewrite and then distribute. First, by rewriting:

Distribute. Recall exponent properties;

Simplify:

This can then be separated (since its addition/subtraction) and integrated individually.
Hence, our answer is B.