A dose-response relationship has been detected between the prevalence of obesity and time spent viewing television. For each additional hour of television viewed in the 12- to 17-year-old group, the prevalence of obesity increased by:

Based on dose-response relationship from the analysed data of  National Health Examination Survey(NHES) Showed that, the prevalence of obesity increases by 2%. for 12-year old group. 11-13years has the highest watching rates

Also, dose-response relationship is also observed between hours of television view and overweight, by National  Longitudinal Health Examination of Labour Market Experience and Youth Cohort.(NLSY). Survey correlating the relationship between obesity and long hours of television view in youths of age range 10-15yrs.

t was concluded that the energy expended during television viewing is less than the resting energy expenditure. Therefore long sitting hours of television viewing  is a contributing factor to obesity. Hence one way of preventing obesity  is to prevent long hours TV watching

Explanation:

your answer will be c. sorry if im wrong: )