You have an Exchange Server 2010 organization.Users access their e-mail from the Internet by using Outlook Web App.You need to prevent users from downloading ZIP files from Outlook Web App.The solution must ensure that users can download ZIP files by using Microsoft Office Outlook. What should you do？（）

• A、Configure the Content Filter agent.
• B、Configure the Attachment Filter agent.
• C、Create a managed folder mailbox policy.
• D、Create an Outlook Web App Mailbox policy.