In order to earn stronger support, the candidate claimed that the new law would allow more women and disabled people to enter the ______ of American life.
【正确答案】
D
【答案解析】 上下文语义。mainstream意为“主流”，the mainstream of American life意为“美国生活主流”，符合句意。故答案为D。artery“动脉，要道”。