Answer:
The correct answer would be option D, The amount of television the adolescents watch.
Step-by-step explanation:
A study's results were published in the magazine in 2002, which took the researchers 17 years to conclude. They did the research in two phases. In the first phase, they recorded the number of hours the individuals spent watching the TV, and in the later years, they recorded the number of aggressive acts by each individuals.
According to their results, The amount of television each adolescent watched did not confound the results of the study. They concluded that the amount of time they spent on watching television did not have caused the aggressive behaviors in the individuals.