Cuáles eran las principales diferencias económicas y sociales entre los estados del norte y los estados del sur de Estados Unidos antes de la Guerra de Secesión?

Brainliesttt !me : ) what brought about the end of the soviet union?

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.

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by o a. region b. culture c. period d. theme