The Centers for Disease Control and Prevention (CDC) a large number of survey programs for monitoring the status of health and health care in the US. One of these programs NHANES), which interviews and examines a random sample of about 3000 people in the US each year. The survey includes and behavior while the examination includes physical measurements and lab tests. Another program is the National Hospital Ambulatory Medical Care Survey (NHAMCS), which includes information from hospital records for a random sample of individuals treated in hospital emergency rooms around the country
To what All people in the US ?
a. The 3000 people surveyed
b. All hospital emergency rooms in the US
c. The random sample of hospital emergency rooms that were surveyed