Please help - it neeeeddd this - im going to fail - i will give you a lot of points

The answer is one of the last two. I am pretty sure that it is corresponding but I could be wrong.

First you need to notice that the 1/5 inside the parens is an exponent, 75^1/5. Then, when you have an exponent inside parens raised to another exponent, you multiply, so you have 1/5 x 3, which is 1/5 x 3/1, which equals 3/5.