Under which condition would the -RECOVER INDOUBT command be necessary?

A.
When a thread has failed and has single phase commit scope.

B.
When the commit coordinator is not available to notify DB2 of the correct commit or abort
action.

C.
When the commit coordinator is not able to determine if threads should be committed or
aborted.

D.
When in-doubt threads have been resolved and DB2 cannot synchronize with the commit
coordinator.