The following text is for questions 40 to 42 . Smartphones consume more energy than conventional cell phones. It is better for you to use the following tricks: Set your smartphone to a dark-colored background. The more dark pixels, the less battery it consumes. Don't set your phone to "auto-brightness". In "auto-brightness", the display will look good, but it is still brighter than you really need. It is better to set the phone to a "super low brightness" level that is still comfortable for you. Switch off the "vibrate mode" when it is not really needed. Use original batteries. Fake batteries do not produce maximum power. They possibly damage electrical components. Set the display screen to be "off" shortly after you use your phone. There are several options in your smartphone from 15 seconds to 2 minutes screen off. It is highly recommended to choose 15 or 30 seconds screen off. Turn on the "sleep times" or "blocking mode" whenever you don't need any internet network. It will switch off the Wi-Fi and mobile data. Update applications you need frequently. The updated application will work optimally during processing. Turn on the power-saving mode. (PR/100/Gg/Gr) What is the text about? A. How to update a smartphone. B. How to use smartphones efficiently. C. How to remove a battery from a smartphone. D. How to get optimal advantages from a smartphone. E. How to save battery power in a smartphone. What is the function of "blocking mode"? A. To update the applications. B. To set the display screen time. C. To save the power of the battery. D. To turn on/off internet access. F To set the briahtness of the ". . . more energy than conventional cell phones." What does the underlined word closely mean? A. Automatic. B. Modern. C. Regular. D. Handy. E. Old.