When did the National Convention legislate to abolish slavery?

Correct answer: In 1794

The governing concept is the changing position of revolutionary France toward slavery in its colonies. The National Convention, during the republican phase of the French Revolution, passed a decree in 1794 abolishing slavery in French colonies. This decision reflected pressure from revolutionary ideals of liberty and equality as well as resistance and political developments in the colonies. The date must be distinguished from 1789, the year the French Revolution began, and 1791, when the Constitution established a constitutional monarchy. The year 1848 is also important, but it marks the final abolition of slavery in French colonies after the restoration and later reversal of the earlier policy. Therefore option C is correct: the National Convention legislated abolition in 1794.