Within the broader scope of Old Testament prophecy, what primary role did prophets like Amos and Micah fulfill regarding the societal injustices prevalent in Israel and Judah?

A They primarily focused on predicting the rise and fall of foreign empires, leaving domestic issues to the kings. B They served as advisors to the royal court, offering strategic guidance on military and economic matters. C They acted as social critics, challenging the wealthy elite and advocating for the rights of the poor and marginalized. D They primarily focused on interpreting dreams and omens for individuals seeking personal guidance.