Members of the Jacobin club were known as _____?
(A) Conservatives
(B) Revolutionary
(C) Terrorists
(D) Sans-culottes

Hint: One of the influential political clubs that were formed by Maximilian Robespierre during the French Revolution was the Jacobin club. Got its name from the convent of St Jacob in Paris. Members of Jacobin clubs were mainly a less prosperous section of society such as shoemakers, landless laborers, etc.

Complete Step by Step Answer
The leader of the influential political club the Jacobin club was Maximilian Robespierre. The Jacobin club has defined their dress code which was long striped trousers and also men used to wear red caps, the symbol of liberty.
The Jacobin club members were known as sans-culottes which means those without knee-breeches. Knee breeches are long boots that were worn by high society people. This discrimination was only for Jacobin club members to differentiate between higher society people and lower section people.
By the time the Jacobin club became popular and powerful and also parallel to the National assembly. In the summer of 1792 Parisians were angered by the short supply and high price of food and the food grains were under the aristocrats so they revolted under the Jacobin club.
The Jacobin club became influential and pressurized society to give the right to vote to all men of 21 years.

So, the correct answer is an option (D): Sans-culottes.

Note The influential political clubs were formed by Maximilian Robespierre during the french revolution as the Jacobin club. Members of the Jacobin club were known as Sans-culottes which means those without knee-breeches. Members were mainly a less prosperous section of society.