![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
By asking a series of questions in Paragraph 5, the author mainly intends to indicate that
A.memory of the past is very important to people
B.found photographs allow people to think freely
C.the back-story of found photographs is puzzling
D.the real value of found photographs is questionable
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)