The answer should be A) Ideology.
Answer:
At the onset on the war, in 1861 and 1862, they stood as relatively equal combatants. The Confederates had the advantage of being able to wage a defensive war, rather than an offensive one. They had to protect and preserve their new boundaries, but they did not have to be the aggressors against the Union.
D) start their own colony
Serfs/Peasants would live on the protected land of the lord's manor in exchange for food and goods. The serfs/peasants basically fueled the manor and created self sufficiency, to the point where some lords even forbade Serfs/Peasants to leave their estate.
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