How does geography play a role in Mexico City’s air pollution problem? A.
It is one of the world’s most populated cities.

B.
The number of cars has increased in the last ten years.

C.
The passing of NAFTA has allowed for more factories to be built in Mexico.

D.
It lies in a valley, surrounded by mountains, that traps in air pollutants over the city.

D. it lies in a valley, surrounded by mountains, that traps in air pollutants over the city.

Explanation: Being in a valley results in air pollution being contained to an area.

i actually have a suggestion instead of an answer, how about next time instead of spending the time to time up the question you take that time and try to figure something out for yourself, do you understand?

explanation:

leave a 5 star and a and brainliest answer if you understand, hope this betters you day, or not i don't really care either way. xd

not really sure i needed the points. sorry