Please answer a,b,c and if they are explanatory/response variables also. Thanks!

Over a 17-year period researchers studied a sample of 707 individuals from a single community. They recorded the number of hours each individual spent watching television during adolescence and early adulthood. In later years, they recorded the number of aggressive acts by individuals in the study. Science magazine published the results in 2002 in an article titled "Television Viewing and Aggressive Behavior during Adolescence and Adulthood." a) What is the explanatory variable? Is it quantitative or categorical? b) What is the response variable? Is it quantitative or categorical? C Name two potential confounding variables in the study