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A major result of the Reconstruction period was that -

1.Cooperation existed between the president and Congress.
2. The South rapidly developed into the nation's major industrial center.
3.New state governments in the South concentrated on ending corruption and enforcing Reconstruction plans.
4.New laws and constitutional amendments attempted to provide equal rights and opportunities for Freedmen.

number three i correct . the former Confederate states were restored to full membership in the Union , In their plans for Reconstruction, both President Abraham Lincoln and President Andrew Johnson sought to allow the Southern States to reenter the nation as quickly as possible.

Explanation:

again, the former Confederate states were restored to full membership in the Union , In their plans for Reconstruction, both President Abraham Lincoln and President Andrew Johnson sought to allow the Southern States to reenter the nation as quickly as possible.