单选题 It was their ______ decision to leave their country, and as a result, they lost their citizenship.
A. compulsory B. deliberate C. carefree D. modest

【正确答案】 B
【答案解析】[解析] 本题空格处是说离开他们的国家是他们深思熟虑的决定。B项“deliberate深思熟虑的”符合题意，如：taking deliberate action(采取谨慎的行动)。其他三项“compulsory义务的；carefree欠考虑的；modest谦虚的”都不正确。