Your company frequently hires from five to ten interns for short contract engagements and makes use of the same generically named G Suite accounts (e.g., user1@your-company.com, user2@your-company.com, user3@your-company.com). The manager of this program wants all email to these accounts routed to the manager’s mailbox account also.

What should you do?

A. Setup address forwarding in each account’s GMail setting menu.
B. Set up recipient address mapping in GMail Advanced Settings.

C. Configure an Inbound Gateway route.

D. Give the manager delegated access to the mailboxes.

Reference: https://support.google.com/a/answer/2685650?hl=en