A coal-fired power plant was built in a small, rural community twenty years ago and is still in use today. Doctors in the area begin seeing a large number of patients with lung diseases. Which citizens are most likely at risk? A.
people whose relatives live very close to the power plant

B.
people whose relatives can pass on immunity to lung disease

C.
people whose genetic composition protects them from air and water pollution

D.
people whose genetic composition can make their lungs more vulnerable to disease