You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a text file which is named SQL01.log on the E: drive. A SQL Server Agent job executes every 2 minutes and logs information to the text file. You get a report from users saying that the sever doesn't make response. As the technical support, you check and find that the SQL Server Agent service does not run and the SQL Server Agent job no longer functions. You have to identify the reason why the SQL Server Agent service is unresponsive.  In the options below, which log should you check? （） 

• A、You should check SQL1.log 
• B、You should check SQLAGENT.OUT 
• C、You should check log_xx.trc 
• D、You should check ERRORLOG