Answer:
Populares
Explanation:
The Populares belonged to the highest Roman aristocracy who have favored the cause of plebeians or common people. It is a political faction aroused in opposition to Optimates who wants to validate the position of oligarchy and they were dominant in Senate. However, the situation began to change after 133 B.C when Populares such as Tiberius and Gaius Gracchus challenged their authority.