How should an app builder configure the proper access?

Universal Containers implemented an application process that uses custom objects Internships and Applications. The organization-wide default for Internships has been set to private and is the master in the master-detail relationship with Applications. The VP of HR wants to allow edit access to Applications to recruiters.

How should an app builder configure the proper access?
A . Set the organization-wide default on the Applications object to Read/Write.
B. Add a sharing rule that grants the users Read/Write access to the Internship records.
C. Create a queue for the web applications and assign access to the users who will be editing the records.
D. Create a sharing rule that grants the users Read/Write access to the Application records.

Answer: B