“Every twenty seconds or so, the transmitter would send out some sharp noise to keep people like George from taking unfair advantage of their brains.’”
This is the best answer because it shows that making people "equal every which way" is a dangerous and foolish goal. In this line, the people are subjected to a sharp noise that disturbs their ability to think and perform to their fullest potential. The purpose behind the noise is to make everyone equal. Since you can't make someone more intelligent or improve their processing speed, the best way to equalize everyone is to bring all the more intelligent and faster processing minds down. This subjection to a disturbing noise just seems ridiculous and foolish.
The other options aren't the best fit. Even though the first option says that people's handicaps are taken away, it doesn't actually show the idea of equality. B indicates that the purpose is equality when it says "taking unfair advantage". Option C and D only give reasons behind the equality.