Q: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Fact1: disease has a negative impact on an organism, Fact2: Smoking was negatively associated with prevalent Alzheimer's disease and dementia., Question: what impact does smoking have? (A) Dehydration (B) good (C) negative (D) dangerous (E) liver cancer (F) healthy (G) wellness (H) cancer
A:
C