The correct statement about the nature and function of the catalyst is（ ）

A、The ammonia synthesis reaction cannot be carried out without using a catalyst
B、The quality of the catalyst does not change before and after the reaction, but the chemical properties should change
C、The catalyst can shorten the time it takes for the reaction to reach equilibrium, but the amount of catalyst loss is large
D、The catalyst can change the forward and reverse reaction rate by the same multiple