单选题 Since its foundation in 1945, the United Nations has written into its major covenants the need to establish minimum ages for marriage, but the custom of marriage is a highly sensitive cultural issue, mainly because it is so unpleasantly involved with women's rights and societal traditions and practices, and rules on marriage vary widely between countries.
【正确答案】 B
【答案解析】解析：attack攻击；agreement一致，协定；diatribe谩骂；directory目录。句意是，自从1945年成立以来，联合国已经签订了主要协议，要求确立结婚的最低年龄，但结婚风俗是一个很敏感的文化事宜，主要因为它涉及女人权利和社会风俗，于是国与国之间的有关婚姻的规定就出现了很大的差异。所以正确答案为B。