The Union Victory at Vicksburg Was of Major Importance for All

The Union victory at Vicksburg was of major importance for all of the following reasons except  

A) it reopened the Mississippi River to Northern trade.
B) coupled with the victory at Gettysburg, foreign help for the Confederacy was irretrievably lost.
C) it helped to quell Northern peace agitation.
D) it cut off the supply of cattle and other goods from Texas and Louisiana.
E) it was the last major battle of the Civil War.