You are a clinician at a small, rural hospital. A mother brings her overweight 10-year-old son into the office for a routine check-up. Which of the following questions might you ask to gain insight into a potential population-level improvement?
(A) "How available are fresh fruits and vegetables in the markets within your community?"
(B) "Are there vending machines with sugar-sweetened beverages in your school?"
(C) "What are the most easily available sources of information regarding nutrition and physical activity?"
(D) All of the above

In a city many improvements can be made to raise the health level of citizens and thus promote better quality of life. These improvements can be seen by offering healthier foods, exercise promotions, popular gyms, more nutritious school lunches, among other things. In this regard, if you were a general practitioner the questions you could ask for information about a possible improvement in the population's health level would be:

"How available are fresh fruits and vegetables in the markets within your community?"
"Are there vending machines with sugar-sweetened beverages in your school?"
"What are the most easily available sources of information regarding nutrition and physical activity?"