Q: You are presented with the quiz "What is lung cancer a consequence of?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "lung cancer is most often caused by exposure to tobacco smoke" and "lung cancer for most is the consequence of smoking". So, what's the best answer to the question?

Select from the following. A). candy cigarettes B). harmful substances C). Greenhouse gases D). malnutrition E). water vapors F). metabolic reaction G). tobacco fumes H). Pesticides
A:
G).