After installing WebSphere Commerce，the WebSphere Application Server fails to start.  Which log file will help determine if WebSphere Application Server was installed correctly？（）

• A、<WAS_installdir>/logs/log.txt 
• B、<WC_installdir>/logs/install_date_time.log 
• C、<WAS_installdir>/logs/<WC_instance_name>/SystemOut.log 
• D、<WC_installdir>/instances/<instance_name>/xml/<instance_name>.xml 
• E、<WAS_installdir>/logs/serverStatus.log