Answer:
A)controller
Explanation:
Based of of the text, it is about power, therefore it aligns with it being a controller..
I would say the 1st one is the only one correct. The 2nd one should be who, the 3rd one should more and likely be whom, and the last one should probably be who. I don't know if I'm 100% though. I hope I helped.
Read the sentence we usually work evenings, but left really early
The answer to your question is C.
I hope this helps you!
