单选题 A member country cannot ally (结盟) itself with ______.

A、 other U. N. member countries
B、 other countries not members of the U. N.
C、 countries resisting openly the U. N.
D、 states against which the U.N. has ever taken preventive or enforcement action

【正确答案】 C

【答案解析】[考点] 细节题
[解析] 此题根据第四段最后一句，会员国不得与联合国公开对抗的国家联盟。故选C。