Why Did the Roman Aristocrats Create a Republican System of Government

Why did the Roman aristocrats create a republican system of government and not a monarchy?

A) They were committed to a government in which all citizens were participants.
B) They distrusted eastern Mediterranean empires such as the Persian Empire and wanted to avoid emulating them in any way.
C) They had come to believe that it was necessary to share power between adult male citizens.
D) They had learned from Greek political theorists about the evils and abuses of monarchy.