To reduce disk consumption, an organization`s legal department has recently approved a new policy setting the data retention period for sent email at six months. Which of the following is the BEST way to ensure this goal is met? 

Answer options:

A. Create a daily encrypted backup of the relevant emails.
B. Configure the email server to delete the relevant emails.
C. Migrate the relevant emails into an Archived folder.
D. Implement automatic disk compression on email servers.

B