How fast can Cisco Unified Communications Manager generate CDR and CMR files?

A.
One CDR file and one CMR file every minute for up to 1 hour

B.
One CDR file and one CMR file every second for up to 1 minute

C.
Ten CDR files and ten CMR files every hour for up to 1 day

D.
Ten CDR files and ten CMR files every day for up to 1 week