单选题 Each educational system is not perfect in a strict sense, which has its______.
【正确答案】 A
【答案解析】[解析] 名词辨析
本句中有一个which引导的非限定性定语从句，which指代主语Each educational system。limitation"限制，局限性”是对not perfect：的同义转述，所以A符合题意。