They threaten to have mr. jones come back and take over the farm again. the animals do not want this to happen, so they obey. this teaches the reader how manipulation is used in the farm to keep the animals together as they begin to break away from the farm rules.
C would have to be your answer because it is the only one that makes the most sense to me right now.
hope this helps
We need a picture of the work
The answer would be ''Ivan Ilyich wanted to put him in the School of Law, but to spite him Praskovya Fedorovna entered him at the High School.''