The correct answer is: A. 70-100 watts.
A 20 to 25 inch home color television uses an average of 70-100 watts of power. This is based on the Energy Star program, which sets energy efficiency standards for appliances and electronics. The Energy Star program recommends that 20 to 25 inch televisions use no more than 100 watts of power.
Option B, 25-50 watts, is too low. A 20 to 25 inch television would need to be very energy efficient to use only 25-50 watts of power.
Option C, 500-800 watts, is too high. A 20 to 25 inch television would need to be very inefficient to use 500-800 watts of power.
Option D, over 1000 watts, is also too high. A 20 to 25 inch television would need to be very large and have a high-definition picture to use over 1000 watts of power.