1. The increased popularity and availability of televisions has led to the decline of regional dialects, language variations which originate from diverse ethnic and cultural heritages and perpetuated by geographic isolation.

(A) which originate from diverse ethnic and cultural heritages and perpetuated

(B) that originated from diverse ethnic and cultural heritages and perpetuated

(C) originated from diverse ethnic and cultural heritages and perpetuated

(D) originating from diverse ethnic and cultural heritages and perpetuated（D）

(E) originating from diverse ethnic and cultural heritages and perpetuating

我知道选D，originating from和perpetuated by并列，但你们怎么就知道originate用主动，为什么不是说这种差异被产生呢？

如果认为是被动的，应该有动作的实施者，不管这个实施者有没被省略。这句话找不出动作实施者。