The correct response is: The Framers did not address the morality of slavery, but rather addressed it as an issue of representation.
In the founding of the nation, particularly during the Constitutional Convention, the Framers focused on how slavery would affect representation in Congress, such as through the Three-Fifths Compromise, which counted enslaved individuals as three-fifths of a person for purposes of representation and taxation. The morality of slavery was largely sidelined in the discussions, reflecting the deep societal divisions and economic interests that surrounded the institution at the time.