What is an EMC Avamar best practice for setting backup retention policies for a new backup environment?

What is an EMC Avamar best practice for setting backup retention policies for a new backup environment?
A . Use advanced retention policies for monthly backups only
B . Create an individualized retention policy for each client
C . Develop retention policies before taking production backups
D . Retain all daily backups for at least 30 days

Answer: C