Answer:
Option A.
Step-by-step explanation:
To surround and bombard the city, cutting off supplies , is the right answer.
In the Vicksburg campaign of the American Civil War, the concluding military action was the siege of Vicksburg. In a set of drills, Gen. Ulysses S. Grant of the Union and his Army of Tennessee passed River Mississippi and forced John C. Pemberton's Confederate Army into the armed sidelines encircling the fortress city of Vicksburg.