I would look back on your notes if I were you. I bet the answer is in there :)
I think it is D. Social reform activities during the Second Great Awakening
In recent time, the aforementioned issues were replaced with
discrimination, slavery and genocide of many Native American. Slavery had been
one of the biggest problems in the United States that had rooted to racial discrimination
and segregation among the citizens of the country as well as it contributes to
genocide to many Native American families that were “civilized” by the current
culture.
