The answer is choice A and here's why
The 2/5 outer most exponent means that we can break it down into 2*(1/5). The 2 is going to apply as an exponent for the whole parenthesis group. The 1/5 indicates we have a 5th root (similar to a square root or cube root,but instead of 2 or 3, it's 5)
In essence, I'm saying that
![\LARGE x^(m/n) = \sqrt[n]{x^m}](https://img.qammunity.org/2017/formulas/mathematics/high-school/6p9r9qdw8obcj4xxr35i11v687q0xoh6ro.png)