Secession means the act of withdrawing from a country and forming another government.
Forms of Government
Secession is a method of withdrawing from a country and establishing another government.
In America, secession happened when the Southern states decided to separate from the Union in 1860s.
Eleven states were split from the Union and formed the confederate of America.
The secession led to the American Civil War.
Thus option A is the correct answer.
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