The correct answer is B) Burnside's.
General Burnside's forces met Lee’s army at Fredericksburg.
One of the largest battles of the Civil War was fought if Fredericksburg.
The Battle of Fredericksburg was fought on December 13, 1862. On November 7, 1862, President Abraham Lincoln removed General George B. McClennan and named Ambrose Burnside the new Union General of the Army of the Potomac. He immediately commanded his forces and advanced to Richmond, the capital of the Confederate states to meet General Robert Lee's soldiers.