Answer:
(D) The international slave trade would be abolished in twenty years.
Explanation:T
Initially, the constitutional convention of 1787 invited several representatives from different states in order to discuss how United States shall be govern.
Several of the delegates that present on that convention actually were anti-slavery supporters. They advocated for slavery to be eliminated in United States.
The supporter of slavery pointed out that slavery actually contribute to a pretty large portion of US economy. Abolishing it right away would create economic problem. Eventually, they decided to gradually eliminate it. Targeting that international slave trade would be abolished in twenty years.