Answer:
The reconstruction era started directly after the civil war and lasted until 1877. President Andrew Johnson was president. This was an effort to reunify a divided nation. Amendments such as the 14th were ratified in this time. Although the Civil War was just won, it is important to remember that slaves were not completely free. There was a process to this and several loopholes were found. Slaves were not yet equal.
Explanation:
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Mathematics was the tool which scientists used to prove their theories and ideas. Mathematics was able to prove whether an idea a certain scientists had was correct or whether it was wrong. With this they wre able to advance the field very rapidly.
i think it is c, the empire knew what it wanted essentially but they did not all have the same ideas on rueling so it didnt really work because theere were no set rules// guidelines