Available options:
[I] oxygen.
[II] Pesticides.
[III] cold temperatures.
[IV] smoking.
[V] bacteria.
[VI] toxins.
[VII] digestion.
[VIII] influenza.
Given those answer options, answer the question: Fact 1: Pathogens can cause disease. Fact 2: Most pathogens are bacteria. Given the two facts above, what can cause disease?
A:
[V]