Long-term smoking causes lung cancer_________
A. Coal tar sticks to the alveolar walls, making the alveoli lose their elasticity
B. Coal tar can cause the body to produce proto-oncogene
C. Coal tar can mutate proto-oncogenes and tumor suppressor genes, resulting in cancerous cells
D. Inhaled carbon monoxide thins the alveoli
Answer:C
Long-term smoking causes lung cancer_________
A. Coal tar sticks to the alveolar walls, making the alveoli lose their elasticity B. Coal tar can cause the body to produce proto-oncogene C. Coal tar can mutate proto-oncogenes and tumor suppressor genes, resulting in cancerous cells D. Inhaled carbon monoxide thins the alveoli