Final answer:
White antislavery activists supported the approach of moral suasion to combat racial prejudice in the antebellum period by appealing to slaveholders' sense of Christian conscience.
Step-by-step explanation:
White antislavery activists in the antebellum period supported the approach of moral suasion to combat the high incidences of racial prejudice. They believed they could convince slaveholders to voluntarily release their slaves by appealing to their sense of Christian conscience. This approach involved spreading arguments against slavery based on moral reasoning and highlighting the immorality of slavery.