test Researchers have linked an increase in the incidence of lung cancer in Austria to a pollutant released by an industrial accident. The study identified 995 people who lived near the site of the accident and were under age 40 at the time. Seventeen of the people had developed lung cancer at an unusually young average age of 45. Medical records showed that they had heightened concentrations of the pollutant in their blood and that each tenfold increase in the level of the pollutant was associated with a doubling of the risk of lung cancer Complete parts a through e below. a) Identify whether the research is an observational study or an experiment. The research is an b) Identify whether i It is observational study. c) Identify the subje elected. Choose the correct answer below. experiment OA. Austrian pe O B. People exposed to the pollutant from the industrial accident OC. The medical records of the people exposed to the pollutant