![](https://lstatic.shangxueba.com/jiandati/h5/images/m_q_title.png)
What is the role of the underlined part As in that bridge in PARAGRAPH THREE()
A.Reflecting on topics that appeal to the author and readers
B.Introducing new evidence to what has been confirmed before
C.Identifying the kinds of questions supported by the experiments
D.Claiming that speakers of different languages differ dramatically