Which expression is correctly developed to use the Power Rule of Exponents?

(7^8) ⋅ (7^10)
12^9
(-5)^0
(7^4)^8

(7^8) ⋅ (7^10) = 7^(8+10) = 7^18

12^9 is already a correctly developed expression.

(-5)^0 is already a correctly developed expression.

(7^4)^8 = 7^(4*8) = 7^32

The expression that correctly uses the Power Rule of Exponents is (7^4)^8.