单选题 As the old empires were broken up and new states were formed, new official tongues began to ______ at an increasing rate.

【正确答案】 C

【答案解析】[解析] bring up“提出，教育，养育”；build up“增进，加强”；spring up“出现；涌现；萌芽”；strike up“使开始；建立起”。新的官方语言应该是不断地涌现，故答案为C。