Answer:
C. by causing mutations in genes
Explanation:
Smoke can induce mutations in genes causing tumors such as lung cancer
The percentage of all new std cases occur in people between ages 15 and 19 is almost 70%. This 70% also increased up to 6.9% and counting. This is conducted by Centers for Disease Control and Prevention which goes down to their own project called STD Surveillance for Adolescents and Young adults.
Sexual coercion, my dude.
being pressured into unwanted intercourse