What was the unions goal when the battle of bull run began(A).to surprise confederate troops,(B).to control the Mississippi River,(C)to capture Richmond,(D)to secure Washington, D.C.

I believe it is to capture the Richmond  

Explanation:

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long  

answer; an active listener;