(A) ** Boost their confidence
(B) Weaken their confidence
(C) ** Make their goal of winning the Civil War more realistic
EXPLANATIONS BELOW
Concept note-1: -We can imagine that the northern countries would have been much weakened, politically and economically. Their industrious prosperity would have been stopped and slavery would have remained in all the United-States for a long time.
Concept note-2: -The Confederacy initially implemented a cordon strategy or cordon defense, meaning that it tried to defend the entire scope of the Confederacy, and soon had troops scattered from Virginia to Texas. Politically, Confederate president Jefferson Davis had little choice but to do this.
Concept note-3: -The Union originally wanted to reunite the country, but after the Emancipation Proclamation of 1863, the Union goal changed to include the abolition of slavery. The Confederacy had the same goal throughout the war: to incorporate all slave states and secede from the Union, survive, and defend its territory.
Concept note-4: -After four bloody years of conflict, the United States defeated the Confederate States. In the end, the states that were in rebellion were readmitted to the United States, and the institution of slavery was abolished nation-wide.