Consider the following statements for the oxygenation of hemocyanine:(A) Oxidation state of both copper atoms changes by two(B) It becomes intense blue from colorless(C) Dioxygen is reduced to $\mathrm{O_2^{2-}}$(D) The $\mu\text{-}\eta^{2}:\eta^{2}$ bond forms between each oxygen and copper atoms.The correct statements are: