76. Historians have always considered Zhang Qian’s mission important because they believe ______.
(A) be brought back knowledge of Rome to the emperor
(B) be discovered the Silk Road
(C) be helped establish East-West trade
(D) be travelled as far as Afghanistan

推理判断题。根据第三段后三句可知：历史学家把张骞出使西域当成是古代东西方交流最重要的一次旅行。他的这次之旅开创了中国和罗马的联系。