What two things would eventually hurt the southern cause during the civil war?
a) the north had too much territory to invade.
b) stonewall jackson was killed in battle.
c) england decided to back the northern cause. england decided to back the northern cause.
d) the south could not replenish fast enough.

The two things that would eventually hurt the southern cause during the civil war are :

- The north has too much territory to invade
- The south cannot replenish fast enough

The north has more vital territories and more advanced technology than the south. Let's say that the south manage to take one territory of the north. Not long after that, that territory will be easily taken back by the north and make all the south's effort became wasted

hope this helps