单选题 Because of difficulties in getting a visa, the students had to ______ the idea of applying for study in the United States.
A. reduce B. yield C. relinquish D. waver

【正确答案】 C
【答案解析】relinquish意思是“放弃”，yield后面加to表示“屈服”，waver是“动摇的，摇摆不定的”。