Which two explanations could be the cause of the performance reduction?

An administrator notices the number of messages being archived per hour by the Exchange Journal Task is significantly lower than normal when compared to the baseline archiving rate.

Which two explanations could be the cause of the performance reduction? (Select two.)
A . SQL database fragmentation has occurred
B . the journal task’s archiving schedule window is too small
C . one of the two journal tasks targeting the journal mailbox is failing to run
D . the version of MAPISV
E . inf is incompatible
F . there is an intermittent connectivity problem between the Enterprise Vault and Exchange servers

Answer: A, E