From Where Did the Thermidorians Get Their Name

From where did the Thermidorians get their name?

A) The name came from the events of July 27,or 9 Thermidor on the revolutionary calendar,when members of the Convention shouted down Robespierre.
B) The name came from Robert Thermidor,who planned the toppling of Robespierre on the floor of the Convention.
C) The name came from the room in which members of the Convention issued the order to have Robespierre executed.
D) The name came from the group of organizers who stood in opposition to the leadership of Robespierre on the Committee of Public Safety.