What event caused four additional Southern states to secede from the Union?%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0AThe U.S. accepted West Virginia as a state.%0D%0AThe U.S. accepted West Virginia as a state.%0D%0A%0D%0AThe South fired on Fort Sumter.%0D%0AThe South fired on Fort Sumter.%0D%0A%0D%0ALincoln declared the Emancipation Proclamation.%0D%0ALincoln declared the Emancipation Proclamation.%0D%0A%0D%0ALincoln raised an army.

The event that caused four additional Southern states to secede from the Union was Lincoln's declaration of the Emancipation Proclamation.