help pls!

Docking stations may be purchased from your laptop manufacturer or a compatible unit (see if they recommend one) can be purchased independently. Which is NOT an advantage for using the Docking stations? There is no standard and docking stations provide different functionality, so you should do a little research before buying It is sometimes possible to "extend" your laptop screen to a desktop monitor, or to directly attach two monitors, providing dual monitors while docked A docking station tends to be a full-sized monitor, standard keyboard, and mouse Other peripherals may become available on the desktop also, such as external speakers, disk drives, and optical storage devices