Final answer:
The adoption of the Declaration of Rights of Man helped pave the way for social reform in the French Revolution.
Step-by-step explanation:
The social reform in the French Revolution was primarily paved way by adopting the Declaration of Rights of Man (B).
The Declaration of Rights of Man and of the Citizen, drafted by the National Assembly, proclaimed that all male citizens were equal before the law and provided basic rights and liberties to the people of France. This included granting equal right to hold public office, freedom of religion, and taxes levied according to one's ability to pay.
The other options listed did not contribute to social reform or were actually detrimental. The Reign of Terror (A) was a period of extreme violence against perceived enemies of the revolutionary government and did not bring about any positive social changes. Storming the Bastille (C) was a symbolic event that marked the beginning of the revolution but did not directly lead to social reforms. Louis XVI's execution (D) was a result of the revolution, but it did not directly contribute to social reform as well.