Answer:
A. the spillover effect.
Explanation:
Spillover effect: The term spillover effect refers to the propensity of an individual's emotion to influence the way other individuals feel around him or her.
In other words, spillover theory defines the legal principle of splitting off the similar evidence that is related to both an accused and a codefendant.
In the question above, the spillover effect is being seen as the people aroused just by seeing the rock videos are compared to that of the people being provoked but didn't get aroused.
C.to limit the powers of the central government by establishing reserved powers for states and individuals