Which case would require you to perform a DB2 conditional restart?

A.
The DASD subsystem has experienced a major problem and the primary active log data sets
are lost. A peer-to-peer remote copy (PPRC) is not available.

B.
The DB2 system fails during normal processing because of an exceptional peak in the
workload. Normal restart abends in the log apply phase whenever DB2 is started.

C.
During restart, the back out phase is taking too long because a long running job that executed
many updates and never committed. The only way to bypass the long back out phase is to
perform a conditional restart with BACKOUT=NO.

D.
The system suffered an outage because of a DASD subsystem failure. The logs are available
but not the table spaces and index spaces.