What should you recommend changing?

You are evaluating the implementation of a Database Availability Group (DAG).
You need to recommend changes to the planned implementation to minimize the loss of large email
messages if a single DAG member fails.
What should you recommend changing?

A.
The preference of the mail exchanger (MX) records

B.
The duration of single item recovery

C.
The intervals of shadow redundancy

D.
The size of the transport dumpster