Final answer:
Jean-Paul Marat published a newspaper called L'Ami du peuple, which supported the Jacobins and their revolutionary agenda.
Step-by-step explanation:
Jean-Paul Marat published a newspaper called L'Ami du peuple which supported the main political group leading the Revolution, the Jacobins. This newspaper was known for its radical and inflammatory articles, advocating for the overthrow of the monarchy and promoting the ideals of the Jacobin club.
Marat used this newspaper as a means to rally support for the Jacobins and their revolutionary agenda, making it a powerful tool in the dissemination of their ideas.