单选题 According to a recent census, suburban residents today have become ______ more diverse in cultural background than they were in the 1960s.

【正确答案】 B

【答案解析】[解析] 副词位置
应该使用副词修饰形容词比较级more diverse，因此副词B. remarkably(显著地，不平常地)是正确答案。形容词A，动词和名词C，动词的过去分词形式D都不能修饰形容词比较级。