Correct. The answer is b. The railroad lines built in the United States include a denser network, but most of them are built in an east/west orientation, illustrating their uses for carrying people and cargo across the nation. The Mexican railroad lines, on the other hand, are built to run exclusively north/south, transporting goods and people between the United States and Mexico.

Incorrect. The answer is b. The railroad lines built in the United States include a denser network, but most of them are built in an east/west orientation, illustrating their uses for carrying people and cargo across the nation. The Mexican railroad lines, on the other hand, are built to run exclusively north/south, transporting goods and people between the United States and Mexico.

Correct. The answer is c. The map illustrates the railroads’ role in connecting the interior of Mexico—especially its major urban areas—to the United States. These connections allowed American agricultural and manufacturing interests to move people and products into Mexico, strengthening the two nations’ economic relationship.

Incorrect. The answer is c. The map illustrates the railroads’ role in connecting the interior of Mexico—especially its major urban areas—to the United States. These connections allowed American agricultural and manufacturing interests to move people and products into Mexico, strengthening the two nations’ economic relationship.