Select the appropriate conjunction: 'Law firms face innovation challenges, ______ their ownership structure limits external investment.'
答案解析
核心考点：连词逻辑关系。解题思路：前后句为因果关系，需选表结果的连词。正确选项B("therefore")体现结果，错误选项A表转折，C表递进，D表让步。易错点：误判句子间的逻辑关系类型。
正确答案：B