Which backup method is described below? “After a full VM backup is created, subsequent backups are incremental. Only data blocks that have changed since the last job run are backed up. All the changes are injected into the created .vbk file to rebuild it to the most recent state of a VM.”

Which backup method is described below? “After a full VM backup is created, subsequent backups are incremental. Only data blocks that have changed since the last job run are backed up. All the changes are injected into the created .vbk file to rebuild it to the most recent state of a VM.”
A . Forever forward incremental backup
B . Reverse incremental backup
C . Forward incremental backup with synthetic fulls with transform to rollbacks
D . Forward incremental backup

Answer: B,C