What took place during the Treaty of Guadalupe Hidalgo?

Ending Mexican-American War

Explanation:

Treaty of Guadalupe Hidalgo was created after United States troops managed to conquered their capital in  Mexico City. The Mexican government proposed the treaty to prevent more unnecessary bloodsheds.

The Mexican government agreed to give United States with the ownership o Carolina and New Grande. In exchange, the United States government need to pull their troops from Mexican territory.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.