How did the union capture of port hudson and the confederates surrender at vikings berg divide the confederacy

During the Civil War The Union Army fought for nearly two months to capture the southern city of Vicksburg, Mississippi. In 1863 the Union´s  capture of Port Hudson and the Confederate´s surrender at Vicksburg divided the Confederacy

This is one of the turning points of the Civil War.

The success of The Battle of Vicksburg was significant because it allowed the Union Army to take control of the Mississippi River from the Confederacy. The Mississippi allowed the Confederates to sell their goods and move their soldiers up and down the river as well as served as a hugely important economic and military lifeline through the river´s seaports throughout the South. Without this crucial aid, the South was gravely limited in its ability to continue fighting.

the answer is b, encourage free trade