问题详情

If we find materials available only in faraway places, it can be inferred that
A．these materials were very popular at that time and sold in many places
B．these materials were very easy to produce and were made locally
C．people in this place were hunting tribes and traveled to distant places
D．these materials were probably got by the means of traveling or trading请帮忙给出正确答案和分析，谢谢！