Remark
Using brackets, as the question has, each of the minus signs is part of the 4. That means you have 2 minus signs in total. They are multiplied together.
Two minus sign's = a plus.
Argument
D is wrong.
The power is not made minus. That would be an entirely different problem. The power and the base have been interchanged. So D has 2 mistakes.
B is also wrong for the same reason.
The power and base have been interchanged. The fact that there are or are not brackets does not make any difference.
A is wrong.
There is only one minus sign given. That cannot happen when there were two to start with.
Answer C.
The two minus signs are preserved. The 2 as a power affects both minus signs.
affects both of them.