What will happen when the publisher is down and a Call Detail Record is written to the database?

A.
The CDR is ignored by the subscriber database.

B.
The subscriber database stores the CDR and replicates to the publisher when the publisher comes back up.

C.
The subscriber database temporarily stored the CDR, but the CDR is deleted when the publisher comes back up.

D.
The subscriber database temporarily stored the CDR, but the CDR is ignored when the publisher comes back up.

Explanation:
Cisco IP Telephony Solution Reference Network Design (SRND) for Cisco CallManager 4.1
IP Telephony Deployment Models
Call Detail Records (CDR)
Call detail records, when enabled, are collected by each subscriber and uploaded to the publisher periodically. During a period that the publisher is unreachable, the CDRs are stored on the subscriber’s local hard disk. When connectivity is re-established to the publisher, all outstanding CDRs are uploaded to the publisher. http://www.cisco.com/en/US/partner/products/sw/voicesw/ps556/products_implementation_design_guide_chap t