It had to do with religious freedom
A. Bus boycotts in Montgomery, Alabama
D. Ratificación of the 13th, 14th, 15th amendments
The main cause of the second industrial revolution was, natural resources, abundant labor supply, strong government policy and new sources of power.
The antislavery movement raised and grew because people kept finding reasons for why slavery is bad. This eventually led to conflict between people against slavery and people for slavery. Another reason why the antislavery movement raised and grew was because slavery has become less useful overtime, as we have machines.