Question

based on a thorough literature review, a researcher has found studies supporting correlations between drug use and neurological diseases, weight gain, and brain cancer. based on these correlations, what can he conclude regarding drug use?
drug use causes neurological diseases.
drug use causes weight gain.
drug use causes brain cancer.
drug use causes neurological diseases, weight gain, and brain cancer.
drug use may cause neurological diseases, weight gain, and brain cancer.

Explanation:

Correlation does not imply causation. Just because there are correlations between drug - use and neurological diseases, weight gain, and brain cancer does not mean drug - use causes them. It only suggests a possible link.

Answer:

Drug use may cause neurological diseases, weight gain, and brain cancer.