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.

What explains the increase in life expectancy in botswana? a. the increased availability of jobs and an improved economy b. access to antiretroviral drugs, hiv/aids education, and widespread hiv/aids testing c. a series of military takeovers that stabilized the political system and led to education reform and increased literacy rates d. a recent military coup that led to an improved healthcare system select the best answer from the choices provided.