What is the purpose of an IBM Tivoli Workload Scheduler V8.6 safe mode upgrade?

A.
It ensures files installed by an upgrade can be rolled back to their previous version.

B.
It verifies all scheduling objects have a valid syntax in the new version before importing them.

C.
It ensures interruptions caused by the upgrade do not risk the integrity of running processes.

D.
It exits an upgrade if there are running jobs and lists out the jobs that are blocking the upgrade

Explanation: