Wine drunk out of a jar through pipes (ruou can) is very popular among highland people in Vietnam.

A. In Vietnam, highland people are often drunk.

B. If you visit highland in Vietnam, it is not difficult to find wine drunk out of a jar trough pipes.

C. Wine drunk out of a jar trough pipes is very rare in Vietnam highland.

D. It is hard to ask highland people to give you wine drunk out of a jar trough pipes.