She refused to _______ what had happened in her office.

She refused to _______ what had happened in her office.
A、acquire
B、achieve
C、acknowledge
D、accelerate
【正确答案】：C
【题目解析】：acquire获得；取得；achieve取得；获得；实现；成功；acknowledge承认；答谢；报偿；accelerate 加速；促进；增加。句意：她拒绝承认在她的办公室里发生了什么。