Power windows are usually inoperable when the car is not running. This is primarily a security feature. It would be a simple thing to allow electric power windows to be operable when the ignition is turned off, however it would also make the car much easier to steal. According to this paragraph, which statement is true? A. People can operate power windows at any time. B. People can`t operate power windows at any time. C. For the sake of safty, the power window can be open at any time D. It's a difficult thing to allow the power window open, when the car is power off.