Q: Fact 1: Gases released during the use of fossil fuels causes global warming. Fact 2: Cars and factories burn fossil fuels, releasing nitrogen oxide gases and reactive organic compounds. Given the two facts above, driving a car contributes to ?

OPTIONS: a. dark matter; b. Quality of life; c. global warming; d. salty cashews; e. kinetic energy; f. lowered energy cost; g. expansion of the universe; h. survive;
The answer is:
c.