Which Oklahoma historical era does B describe? A. The Civil War
B. Reconstruction
C. Settlement period
D. The American Indian republics

B is represented by The Civil War

Explanation:

Just find out which one occurred during that period .

Reconstruction happened from 1865-1877 which would represent C

If you recall learning , The Civil War started because of the Confederates and that took places from 1861-1865. The Civil War represents B.

answer; i do believe that the (14th)fourteenth amendment is the correct answer

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories