Please explain. not sure how to answer this

D.

Explanation:

Your choices are the following:

There isn't much evidence for A to be true, only Colombia's capital city raised from 11% to 15% of the population.

There is no evidence for B. Nothing in the graph suggests population changes are attributed to pollution.

There is no evidence for C. Nothing in the graph suggests population changes are attributed to a diversified economy.

There is some significant evidence for D. Argentina, Brazil, Mexico, Panama, and Venezuela all had less of their respective populations living in the capital city. The population may have spread outwards out of cities. This is the most logical choice.

b. the 200th birthday of the united states