Identify how robert e. lee responded to the battle of vicksburg.
group of answer choices (more than one answer)

a)he sought to develop a military strategy that would persuade copperhead democrats to end the war.

b)he would surround the union army in vicksburg, force them to enter the city, and subjugate them to the same treatment endured by rebel soldiers.

c)he would retreat south to devise a plan for a single infantry division to sneak into the city of vicksburg and lead a counterattack against the union soldiers outside the city.

d)he would strike again into the north to force a union retreat from vicksburg to defend its home territory.