General William T. Sherman's "March to the Sea" was important to the Union war effort because

Responses
A it placed the Mississippi River under Union control.it placed the Mississippi River under Union control.
B it convinced Great Britain to stop supporting the Confederacy.it convinced Great Britain to stop supporting the Confederacy.
C important railroad tracks were destroyed, severing supply lines for Confederate forces.important railroad tracks were destroyed, severing supply lines for Confederate forces.
D Robert E. Lee was forced to surrender his forces as a direct result of Sherman's victory.

C important railroad tracks were destroyed, severing supply lines for Confederate forces.