Safe Mode is an essential Startup tool for troubleshooting Windows 98. Which two methods cause the system to start up in Safe Mode？（）

• A、start the system in DOS Mode and run the WIN /S command
• B、press the  key while restarting system - select Safe Mode
• C、start the system in DOS Mode and run the safe.EXE file
• D、hold  key while restarting the system； select Safe Mode