Which piece of evidence best supports the theme that

power can corrupt people?

Hey there!

Not sure what your answer choices are, but perhaps you could answer based on what I give you. 

One thing that comes to mind is that people can become distracted by socializing with one another, which can affect the time and effort that they put into their work. Think about the fact that if you are in a classroom and someone is talking to you that you'll need to divide your attention between your work and your conversation, at least, in theory. It's not actually humanly possible to successfully multitask, only switch between tasks quick enough to pass it off as multitasking. 

Also, if someone has a job on the more tedious or boring side, they may enjoy socializing more than their job and will become even more distracted by their conversations.

TL;DR, this will just decrease the quality of their work and how much work they actually get done. 

Hope this helped you out! :-)