Your portable computer is in sleep mode. When you resume work on the portable computer， you are not prompted for a password.  You need to ensure that you are prompted for a password each time the portable computer recovers from sleep mode.  What should you do？（）

• A、Configure the computer to hibernate when not in use.
• B、In the current power plan settings， configure the computer to require a password when recovering from sleep mode.
• C、Configure the computer to use the High Performance power plan.
• D、Configure the screen saver settings to require a password on resumption of work.