The correct answer to this open question is the following.
Although there are no options or further references attached we can say the following.
The factors that contributed to the spread of antislavery sentiment in the North beyond committed abolitionists were the inspirational ideas that spread from the Second Great Awakening that invited people to have elevated morals and ethical principles and following the example of Jesus of Nazareth.
That is how northern people who lived in Massachusetts and New York spread abolitionists ideas to other parts of the North.
One example of these people's actions was the Underground Railroad.
People in the North opposed slavery and before and during the Civil War found ways to help slaves. The Underground Railroad was a group of Northerners that helped African Americans to escape the South and offered shelter. The Quakers were among those groups that offered help to slaves that wanted to escape from southern plantations.
