You are employed as the exchange administrator at Company.com.the Company.com network contains an exchange 2010 organization that contains a single mailbox server named -ex01.Company.com has its headquarters in stockholm where you are located.-ex01 in turn contains two mailbox databases named kingdatabase1 and kingdatabase2.you receive an instruction from the cio to restore a backup of kingdatabase1.to ensure productivity you need to make sure that all examways users can connect to the mailboxes on kingdatabase1 whilst you doing the restore. What should you do？（）

A. Your first step should be to create a Client Access server array.
B. Your first step should be to create a database availability group （DAG）.
C. Your first step should be to create a recovery storage group.
D. Your first step should be to create a Recovery Mailbox database.