The main purpose of the passage is to

I noticed there was a discussion on April 11, 2019 that was not answered because of technical difficulties (another participant's question was not posting). I have the same question since I approached the question the same way. I will repost what @JeremyG posted then as I would like to have an answer on that same question: "I am not sure how you can reconcile the claim that “there is no shift in theoretical debate that is mentioned by the author” against this quote from lines 5-8: “New theories of social movements are being discussed, not just among psychologists, but also among political theorists.” I was between choices C and E but ultimately decided on the former on the basis of that quote. E seemed wrong because it failed to discuss the political theorists' point of view. I am still not entirely sure why C is a weaker answer than E. Please advise." Thank you in advanced.