WHERE DOES THE EXCLUSIVE POWER OF THE NATIONAL GOVERNMENT END AND THE POWER OF THE STATES BEGIN?

The majority of the republican party during the reconstruction was called:

What conclusion can be drawn from the information in the chart? a) africa's total number of hiv/aids cases makes up close to 20% of the world's total aids cases. b) poverty and lack of education are the only factors that have pushed the african aids rate to 6.1%. eliminate c) a major challenge facing african governments is finding a way to effectively combat the aids epidemic. d) north american aids rates are lower than the worldwide rate because of extensive government intervention and spending.

How would having more railroad tracks be advantageous during a war