What is the best explanation for the following Expand events?
\ODS3 02/09/00 10:36:45 AM CPU-Number 4 TANDEM.OMF.D43 CPU Down 103
ODS3 02/09/00 10:36:47 AM LdevName \ODS3.$ODS4A TANDEM.EXPAND.G06 net-line-notready 45
\ODS3 02/09/00 10:36:47 AM LdevName \ODS3.$ODS4A TANDEM.EXPAND.G06 net-line-ready
44
A.
One Expand line was taken down and another was started.
B.
Network line went down and was started by an operator.
C.
Normal periodic Expand re-synchronization occurred.
D.
Processor failure caused the Expand line handler backup to take over.