单选题 Parents have a legal ______ to ensure that their children are provided with efficient education suitable to their age.
A. impulse B. influence C. obligation D. sympathy

【正确答案】 C

【答案解析】[解析] obligation指法律或道义上的义务或责任，例如：a legal obligation to serve in the agreed forces服兵役的法律义务。impulse驱使，推动：the impulse of curiosity好奇心的驱使。influence影响；sympathy的意思是“同情心”。