A company is using Replication Manager to back up multiple Microsoft Exchange 2010 mailbox servers. They have configured a backup job defining the options for performing VSS backups of each Exchange storage group on each server. All backups are executing successfully, but the company has recently started to experience problems with low disk space on the transaction log volume of one particular storage group.
What is the likely cause for the low disk space?

A.
Online Copy option was specified for that storage group

B.
PreCopy option was specified for that storage group

C.
No Copy option was specified for that storage group

D.
Online Full option was specified for that storage group