问题详情

In paragraph 5, why does the author use the sentence, "Code switching occurs between people who share more than one common language; however, it can also occur between people, who share a language and a dialect, or variation, of that language."？
A．To make a transition.
B．To summarize an idea.
C．To give an example.
D．To start a conclusion.请帮忙给出正确答案和分析，谢谢！