How should Sarah accomplish this?

Universal Containerskeeps product brochures in Salesforce as files. Sarah shares a public Unit to a product brochure with potential customers during a meeting. She wants to ensure they do not have access to the file after the meeting.

How should Sarah accomplish this?
A . Rename the file.
B. Delete the public link.
C. Delete the file.
D. Move the file to another folder

Answer: B