Of course the device is not working, you have not __ it. oreera: square plugged in 2 square disappointed 3 square

The correct answer is:<br /><br />1. plugged in<br /><br />Explanation: The sentence "Of course the device is not working, you have not __ it." is looking for a verb that describes the action of connecting the device to a power source. The word "plugged in" fits this context perfectly, as it means to connect the device to an electrical outlet or power source. The other options, "disappointed" and "3," do not make sense in this context.