Final answer:
The example of a lifestyle choice that can make a genetic predisposition for a disease worse is a person with asthma who decides to smoke, as it can exacerbate their condition.
Step-by-step explanation:
An example of how lifestyle factors can exacerbate a genetic predisposition for a disease is option D) A person born with asthma who smokes. Smoking is a lifestyle choice that can aggravate asthma symptoms and lead to more frequent and severe asthma attacks. This illustrates how environmental factors can trigger symptoms in individuals who already have a genetic predisposition to a health condition. In contrast, the other options depict behaviors that are aimed at managing or mitigating the effects of the predisposition, rather than worsening them.