You work as a network Exchange administrator at Company.com.The Company.com network currently consists of a single Active Directory forest containing a single domain named Company.com.The Company.com organization makes use of Microsoft Exchange Server 2010 as their messaging solution.During the course of the business week you receive instruction from Company.com to prevent the network users from accessing public folder using Outlook Web App （OWA） whilst ensuring you solution prevents the users using Office Outlook to access public folders.What should you do？（）

• A、You should consider having the default Outlook Web App Mailbox policy modified.
• B、You should consider having the properties of the public folder database modified.
• C、You should consider having a managed folder mailbox policy created.
• D、You should consider having the properties of the OWA virtual directory modified.