Answer:
The correct answer would be Family history of lung cancer.
Explanation:
Uncontrollable risk factor are the factors that are beyond the control of a person. A person is unable to control such factors. In this example, an individual is and old man, he smokes, he lives in a polluted city, he doesn't exercise, he eats fast food daily, and he has a history of lung cancer in his family. All of these factors are controllable. He can quit smoking, he can move to another less polluted city, he can start eating healthy food, he can start doing exercise, but he cannot control the family history of lung cancer.
