Answer:
C
Step-by-step explanation:
A: how could the south be weak when they won this battle? Don't choose A.
B: The North lost this battle much to their dismay. The South had certain advantages that the North overlooked, one of them being leadership and another a first rate Calvary. B is wrong.
D: Bull run was a battle that lasted just one day. It was not a matter of desire. The battle wasn't long because eventually the South overran part of the North's army. The won much to the surprise of the North who had 30000+ troops to the South's 20000. To summarize, the South's leadership was better able to snatch victory. I wouldn't choose D: if the wording was better, it might be a better choice. I don't think D is the answer.
C: When all is said and done, C is the only possible answer.