The transcontinental railroad connected

a. northern cites to mexico
b. the east coast to the west coast
c. cotton plantations to southern cities
d. new york to washing d. c.

C. cotton plantations to southern cities

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.