During the late 1840s and early 1850s, the addition of new territory into the united states affected the sectional disagreements over slavery by

the navigation act prevented the colonies from exporting to countries other than britain and it prevented the importation of goods by other countries as well. so i believe the correct answer is d. other nations could not deliver goods to the colonies.

hope this .

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explanation:

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the main objectives of the progressive movement were eliminating problems caused by industrialization, urbanization, immigration, and political corruption.