Answer:
by providing examples of the ways in which ordinary citizens have used social media to report on corruption and abuses that would normally be hidden
A. None of these questions fully say what happened in Salem but A makes the most sense based on the question.
The theme is the moral or the lesson of the story. After reading the story, which of the answers gives you a lesson that is universal (can apply to anyone) and fits with the story. For example, one could say that the moral of Finding Nemo is "always listen to your parents as they know best". No specific details like names or places are given in the theme.