Which of these equations is correct?

A.
(2^2)^4 = 2^6
B.
(3^5)^-2 = 1/3^-10
C.
(5^-3)^6 = 1/5^18
D.
(8^3)^2 = 8^9

B.

(3^5)^-2 = 1/3^-10