The correct answer is A) Union soldiers, who mostly voted for Lincoln.
The US presidential election in 1864 was largely decided by Union soldiers, who mostly voted for Lincoln.
If we have the context of this election in mind, we realize that the elections were held on the fourth year of the American Civil War, so the situation was very difficult for a country that was so divided into two factions; people from the north, abolitionists; and people from the South, the Confederate states that supported slavery.
In this, the 20th presidential election of the United States, Abraham Lincoln faced no difficulties to defeat George B. McClellan, the Democratic candidate from New Jersey.
