Cause: African Americans gained rights. Effect-???

Look at the cause and effect chart during Reconstruction African-Americans in the South gained many rights.

Which of these should replace the question mark?

A. Plantations thrived.

B. Racial tensions increased.

C. The economy quickly improved.

D. Many whites moved to the North.

c

explanation:

c

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;