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 user named Rory Allen from downloading attachments which are larger than 50 KB when making use of Exchange ActiveSync whilst ensuring your solution affects no other users. What should you do？（）

• A、You should consider having the properties of Rory Allen’s mailbox modified.
• B、You should consider having the properties if the default Exchange ActiveSync Mailbox policy modified.
• C、You should consider having a new ActiveSynce Device Access rule created.
• D、You should consider having a new Exchange ActiveSync Mailbox policy created.