In the book all the characters are perfectly fine living their life’s being controlled by Society. But Cassia is not fine with this. She stands up for herself and stands by her morals. This book gives us an insight on society today. It gives us an insightful message not to succumb into the plain everyday life that everybody does and give society a run for their money. Or it could mean hang on to your own thoughts and be yourself, don’t let them change you. It also means to put up a fight, if the society says you are doing something wrong to prove to them and everybody it is truly right.
It is not an effective thing to create change in society. Yes it may work, but it can cause riots and things of that sort. A change caused by fear is not efficient. (Im sorry I don’t have time to get some examples, I’m leaving rn.)
Letter choice C is what you're looking for :)
Hope I helped!
Option D is correct here, i.e. the word 'because' is the best answer. As
the word in essence indicates that one state or thing is effectively
bringing about a change on another is being the cause.