A piece of hot copper at 100ºC is plunged into a pond at 30ºC. The copper cools down to 30ºC, while the
pond, being huge, stays at its initial temperature. Then-
(A) copper loses some entropy, the pond stays at the same entropy
(B) copper loses some entropy, and the pond gains exactly the same amount of entropy
(C) copper loses entropy, and the pond gains more than this amount of entropy
(D) both copper and the pond gain in entropy