A peaceful march is more effective than a poster calling for violence because violence is never an a good answer and a peaceful march shows That things can be accomplished without violence
The appropriate response is self-fulfilling prophecy. A self-fulfilling prophecy is a forecast that straightforwardly or in a roundabout way makes itself turn out to be valid, by the very terms of the prediction itself, because of positive criticism amongst conviction and conduct.
The second amendment gives people the right to own guns. The third amendment basically states that you can’t force people to house soldiers (more relevant in the older times). So, obviously the amendment we are dealing with here is the second amendment. A city or state is not allowed to ban something that is protected by the amendments, and having and owning a hand gun is protected by the second amendment (with a license). Therefore, the city of Chicago violated the second amendment. Your answer would be A.
Hope this helps :)