单项选择题

Questions 24 and 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
Now listen to the news.

The stikers are denied entry into the U. S. because ______.

A.AIDS virus has been found among them
B.they can not get political asylum in the US
C.the US government has refused to take them
D.they don’t accept proper medical treatment