The barriers to exercising are classified as excuses. Excuses like ones physical attributes shouldn't be an excuse to not exercise but a motivator. Time management is another barrier that is classified as an excuse. Even if someone has school or work there is a part of the day that can be used for exercise. Exercising doesn't always have to be an hour in the day.
The answer is opium and Heroin
Cereal companies are blamed for putting too much sugar into their products, which causes obesity. This is bad for them, as it would stop people from bying their products. So they would have an interest in study showing that this is not the case: the study would be a self-interest study (the correct answer) and therefore not be reliable
