Which is wrong among the following statements about mixtures? ( )(2 points)

A、The sulfuric acid solution of chromium trioxide mixes with organic matter and may explode.;

B、Ammonia nitrate may burn when mixed with activated carbon.;

C、Perchloric acid may explode when mixed with metal salts.;

D、Perchloric acid may explode when mixed with hydrochloric acid.