56. According to this passage, which of the following is true?
(A) The outbreak of foot-and-mouth disease is closely related to the mad cowdisease.
(B) Holding a referendum for reopening the talks on beef trade is the guarantee forthe safety of beef products.
(C) Refusing to consume American beef may be the safest way to preventourselves from the mad cow disease.
(D) The skulls, backbones, brain matter, and certain intestine parts and organs ofAmerican beef provide good nutrition for people.