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

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）.