单选题 Which of the following is closest to the main idea of this article?

A、 Many immigrant families have problems with communication.
B、 Second generation Korean immigrants often speak only English.
C、 The language spoken in immigrant households is often a mixture of two languages.
D、 Teaching immigrant children the parents' native language helps them establish their ethnic identity.

【正确答案】 D

【答案解析】最后一段。作者认为，教第二代移民自己国家的语言有助于家庭的和谐，有助于两代人之间的理解，有助于建立他们的同一性。