Which statement is an example of epidemiological evidence that connects smoking with lung cancer?
- AChemical analysis of tar from cigarettes shows that it contains carcinogens.
- BDogs made to inhale the smoke from cigarettes develop lung tumours.
- CThe incidence of lung cancer increases in a population as more cigarettes are smoked.
- DWhen tar from cigarettes is rubbed onto the skin of mice, the mice develop skin tumours.