【单选题】
According to Hahn, all the following increase the transmission of AIDS virus EXCEPT ______.
A.hunting and killing more chimpanzees.
B.more champ hunters moving to cities
C.people's changed sexual behaviors.
D.travelling to more African countries.
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根据网考网移动考试中心的统计,该试题:
3%的考友选择了A选项
6%的考友选择了B选项
17%的考友选择了C选项
74%的考友选择了D选项