Most battles were on Southern territory - home ground, with local civilians on their side.
They had a simple and emotive war-aim - to defend the homeland against the invader.
They were a more soldierlike people - used to the riding and shooting way of life.
Some of the best officers in the US Army had resigned to join the Confederates.
In the first half, Lincoln had failed to promote his best Generals.
The answer for your question is D
The Shah was very unpopular with many Iranians. Iran is a very traditional Muslim nation, and many of the Iranian people were displeased with the changes the Shah imposed upon them. Many people close to the Shah were corrupt. Anyone who disagreed with the Shah was forced to leave the nation or face SAVAK, the Shah’s brutal secret police