Fact 1: Smoking tobacco decreases stamina. Fact 2: Tobacco is smoked in pipes or in cigarettes or bidis. Given the two facts above, what decreases stamina?

Choose from:
(I) cleaning pipes;
(II) liver cancer;
(III) viruses;
(IV) smoking meat;
(V) smoking pipes;
(VI) smoking volcanoes;
(VII) Dehydration;
(VIII) harmful substances;
Answer:
(V)