2.1.2 [While the detrimental effects（不利影响）of noise in classroom situations are not limited to children (experiencing disability)], those with a disability (that affects their processing of speech and verbal communication) could be （extremely） vulnerable.The adverbial clause in the sentence introduced by “while” belongs to
选项：

A:an adverbial clause of time（时间状语从句）.
B: an adverbial clause of concession（让步状语从句）.
C: an adverbial clause of cause（原因状语从句）.
D: an adverbial clause of condition（条件状语从句）.