You work as the Exchange administrator at Company.com.The Company.com network contains an Exchange Server 2010 Organization.The organization contains 1，200 mailboxes with an average size of 700 MB.Company.com employees make use of Microsoft Office Outlook 2010 or Outlook Web App to access their email.Company.com employees who run Microsoft Office Outlook 2010 are configured to make use of the Cached Exchange Mode.During the course of the day you receive an instruction from the CIO to devise a mailbox solution for the organization.Management wants you to make sure that administrators are able to search and locate any message.You should also ensure that the size of the offline store （OST） for every employee is decreased as well as providing access to e-mail messages using Outlook 2010 or Outlook Web App. What should you do？（）

A. You should consider having a second disabled user account as well as second mailbox created for every employee.Thereafter the journal rules should be configured in order to journal all the messages for every employee to the second mailbox of the employees.
B. You should consider having a Personal Archive created for every employee.Then a retention policy should be created.
C. Thereafter employees should be instructed to compact the OST file.
D. You should consider having a new disabled user account as well as a new mailbox named Journaling Mailbox created.Thereafter journal rules should be configured in order to journal all the messages for employees to the Journaling Mailbox.
E. You should consider having a personal folder （PST） file created for every employee.Then the PST files should be stored on the network share.Thereafter employees should be instructed to compact the OST file.