Which early 1900s construction project of the United States has served as a center of urbanization, transportation, and economic activities in Central America?A. Port-au-Prince in Haiti B. Bridge of the Americas in El Salvador
C. Pan-American Highway
D. Panama Canal in Panama

Select the best hypothesis explaining why countries may have preferred communism. communism promised jobs after the insecurities of war. communists forced the people to do what they said. communism was fueled by a dislike for democracy. communism provided economic freedom for businesses and workers.

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

Adepression on the surface of the land caused by the collapse of a cave roof is a blank. a) valley b) sinkhole c) mound