[单选题]You issued the following command： ALTER DATABASE E

A The block change tracking feature is enabled， and the information about the system change number is written in the change tracking file.

B The block change tracking feature is enabled， and the information about the log sequence number is written in the change tracking file.

C The block change tracking feature is enabled， and the information about the blocks that are changed since the last backup is written in the change tracking file.

D The block change tracking feature is enabled， and the information about the locations of the datafiles and the online redo log files are written in the change tracking file.