Final answer:
c. In the movie 'Mean Girls', the parents are able to put a stop to the relational aggression.
Step-by-step explanation:
In the movie 'Mean Girls', the character who is able to put a stop to the relational aggression is C. The parents. In the film, the parents play a crucial role in understanding the behavior of their daughters and intervene to address the relational aggression happening among the high school girls.
The parents have conversations with their daughters and enforce consequences for their actions, which ultimately helps to stop the aggression.