Hellp asap ! review the map above. why is the black line significant in american history? a. it represents the northern boundary line for territory claimed by mexico. b. it represents the main route for settlers moving into the oregon territory. c. it represents the northern boundary line for the territory claimed by the united states. d. it represents the path of the transcontinental railroad, a major trade route in the united states.

B. It represents the main route for settlers moving into the Oregon Territory.

i believe that B is your best answer, as it looks like it is showing the Oregon trail, which led from Independence to Oregon.

hope this helps

i believe the answer would be 1.

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