Answer:
It means like how are social changes crated. This means like changes in how we create relationships and continue them. We dont realize, but we are changing everyday. So in this question its asking how are those changes created and how to they last?
One is the social reform movement.
The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.
A because he was very optimistic.