What is the recommended way improve the backup time?

The backup of a 2 TB Microsoft Windows file server is exceeding the backup window requirement.

What is the recommended way improve the backup time?
A . Use block based backups
B . Decrease the number of AFTD devices on a storage node
C . Disable Client Direct to perform backups using a storage node
D . Perform a backup using a remote AFTD device

Answer: B