The correct answer is A. Slavery was not an issue
In the beginning of the 1800's slavery was still a big thing in the south even though the North disproved of it. That is one of the main reasons why the civil war was fought and why the emancipation proclamation was made to free the slaves from rogue states.
It was because more money was being spent buy businesses and these businesses were either close to or in the cities.
The British thought they had more supporters in the South
He forced a attack to retaliate on them