Why did samuel sewall write "the selling of joseph: a memorial"?

to explain why joseph was sold into slavery
to refute the claims of proponents of slavery
to encourage readers to convert slaves to christianity
to gain support for an abolitionist law freeing the slaves

To refute the claims of proponents of slavery.

Explanation:

"The Selling of Joseph: A Memorial" by Samuel Sewall is an essay about the slavery system that is in America and how it is a crime. This paper became the first paper ever published related to anti-slavery in New England.

Samuel Sewall's essay condemns the practice of slavery. It includes legal, political and even biblical references to the issue of slavery and arguments about it. This condemnation of the slave trade in North America presents arguments about all aspects of slavery. He criminalizes the action and participation in the selling and buying of any slaves. Presenting a liberal viewpoint about the slavery issue, he became one of the first abolitionists in the history of the slavery period.

i think the answer is second