Identify the correct clause structure: '_____ the royal family remains symbolic, its political influence has significantly declined.'

A. While

B. Because

C. Unless

D. Until

核心考点：从句连词辨析。解题思路分析：句子需要表达对比关系。正确答案依据：A项'While'正确引导让步状语从句。错误选项分析：B项表因果，C项表条件，D项表时间。易错点提醒：需区分不同连词的逻辑关系。

正确答案：A

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