Answer:
A) modify his major research question to expand or narrow its focus
Explanation:
Peer meditation programs enables students to talk about their differences with other students, after which there will be an agreement so that there will be no more violence.
Since Anson's research method involves a trained student mediator to help resolve issues between the students, but Anson has also learnt from his school magazine and a social media post about the importance of self-positive, in order to revise his research plan, he will need to modify his major research question to expand or narrow its focus.
Anson will need to modify his research question and expand it, thereby not only focusing on the trained student mediator, since he now knows there are other ways to achieve peer mediation.