单选题 Many countries had already removed the distinction between widows and widowers as regards eligibility for survivors" benefits, and some were extending protection to other single parents.
【正确答案】 C
【答案解析】[解析] 句意：关于幸存者救济金领取资格，许多国家已经取消了寡妇和鳏夫的区别，一些国家还把其他单亲父母也包括在内。distinction区别，差别。difference差异，不同。indication迹象，象征。reference参考，参照。relationship关系，关联。