单选题 You must ______ yourself, or they will continue to bully you, so you will go on living in disgrace.

【正确答案】 C

【答案解析】[解析] assert oneself坚持自己的权利，表现自己的权威；promote促进，提升；strengthen加强，巩固；assert断言，声称；assess估计，评估。