Final answer:
Rupert would likely experience the most cognitive dissonance in this scenario due to his belief that game developers should not profit from promoting violence, which conflicts with the reality of the gaming industry.
Step-by-step explanation:
Based on the provided scenario, Rupert is more likely to experience cognitive dissonance since his belief system conflicts with the reality of game developers making money from violent video games. Cognitive dissonance is a psychological discomfort experienced when an individual holds two or more contradictory beliefs or values. Rose does not seem to have this conflict, as she justifies playing violent games by distinguishing between virtual and real-life violence.
Research by Anderson and Bushman reveals that exposure to violent video games can increase aggressive thoughts and behaviors, which suggests that Rupert's concerns may have a scientific basis. They found a causal relationship between usage of violent video games and aggression, which might contribute to Rupert's stance against the monetization of such content.