the answer is B because i just got it wrong and this is it
C - Mexico granted its norhter terrorities to the US. The US terrority now reached all the way to the Pacific Ocean in the west.
The Mexican American war resulted in the Treaty of Guadalupe and gave the US sovereignty over Texas and western terrorities.
The Transcontinental Railroad innovation had the GREATEST impact on westward migration immediately after the American Civil War.
After the Civil War, there was great interest and opportunity with westward expansion. With the invention of the railroad, the transport of goods and people became quicker and less expensive than ever before.
Answer:
concurrent federal department of treasury
I think it would be B but not forsure
