C
Advertisement: Cigarettes are deadly. Hundreds of thousands of people die every year from smoking-related causes, such as lung cancer or heart disease. The science is clear -- smoking a pack per day for years will shorten one' s life. Sitting in a room where someone is smoking might as well be a gas chamber in terms of damage to long-term health. Which one of the following best describes the flaw in the author's reasoning?
A: The advertisement uses overly broad generalization.
B: The advertisement relies on shoddy science.
C: The advertisement draws an unjustified analogy.
D: The advertisement confuses cause and effect.