(A) ** it set the stage for the rest of the Civil War as both sides knew it would be a long, drawn out war.
(B) it showed the strength of the Union Army
(C) led to the capture of Washington D.C.
(D) led to the capture of Richmond
EXPLANATIONS BELOW
Concept note-1: -Bull Run was the first full-scale battle of the Civil War. The fierce fight there forced both the North and South to face the sobering reality that the war would be long and bloody.
Concept note-2: -The first land battle of the Civil War was fought on July 21, 1861, just 30 miles from Washington-close enough for U.S. senators to witness the battle in person. Southerners called it the Battle of Manassas, after the closest town. Northerners called it Bull Run, after a stream running through the battlefield.
Concept note-3: -Federal forces under General Irvin McDowell attempted to flank Confederate positions by crossing Bull Run but were turned back. The end result of the battle was a Confederate victory and Federal forces retreated to the defenses of Washington, DC.