Why was Robespierre executed?

After a year of harsh rule by Robespierre, many of the revolutionary leaders had had enough of the Terror. They turned on Robespierre and had him arrested. He was executed, along with many of his supporters, by guillotine on July 28, 1794. The intensification of the 'Reign of Terror' and Robespierre's autocracy made him increasingly unpopular. French military successes served to undermine the justification for such ruthlessness and a conspiracy was formed to overthrow Robespierre. On 27 July 1794, he was arrested after a struggle.

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

the answer you are looking for is letter c. he supported the idea of a un-run war in serbia to bring peace to the area.

supporting this idea was an important step that bill clinton took in order to attempt to secure bosnia and keep the peace there. he led peace reconciliations -known as the dayton agreement- leaving bosnia as a single state made up of two parts with one central government.