(8^4)^2=

A. 8^2
B. 8^6
C. 8^8
D. 8^16

D. 8^16

To simplify (8^4)^2, we first calculate 8^4 to get 4096. Then, we raise 4096 to the power of 2, which equals 4096^2 = 16,777,216. This can be written as 8^16.