Answer:
C
Step-by-step explanation:
Example: 4^3 = 64
A means 4*3, which is 12.
B means 2/(4^3), which wouldn't cancel out anything.
C is 4^3 = 64.
D means 4^4 would make a perfect square just because 4 is to the power of an even number. 4^4 = 256, which can't be divided by x to get x.