Answer:
Option C: It gave the South a sense of confidence.
Explanation:
This battle is also known as First Battle of Mananas and was the first major battle of the American civil war under which confederate attained victory. The battle took place in July, 1861 under which confederate force of 20,000 defeated the Union troops with strength of 35,000 along the river Bull Run, that's why this victory gave the South an exaggerated sense of confidence.