Available options:
A). Dehydration.
B). good.
C). negative.
D). dangerous.
E). liver cancer.
F). healthy.
G). wellness.
H). cancer.

Fact 1: Disease has a negative impact on an organism. Fact 2: Smoking was negatively associated with prevalent Alzheimer's disease and dementia. Given the two facts above, what impact does smoking have?
Answer:
C).