单项选择题

When did VN-Index begin its declining trend
When did VN-Index begin its declining trend
A.Three years ago. B.In early 2007.
C.Towards the end of 2007. D.At the beginning of 2005.

A.Three years ago.
B.In early 2007.
C.Towards the end of 2007.
D.At the beginning of 2005.