You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2002 instance. You upgrade this instance to SQL Server 2008. You configure the Agent service to use the LocalSystem account. There is a file named Orderdata on a remote network share. A job accesses this Orderdata file by using a CMDExec step. The job step fails to complete execution after the upgrade. You must make sure that the job can complete execution, so you have to configure the job step. What action should you perform? （） 

• A、You should configure a certificate 
• B、You should configure the SQL Server Agent service to use the NetworkService account.
• C、You should configure the job step to use a proxy account 
• D、You should configure the SQL Server Agent service to use a local Windows account