What was Rome’s constitution?

A.
a written collection of laws

B.
a set of rulings issued by the Roman kings

C.
a process for rising from lower to higher offices

D.
a system of rules to organize government

D. A system of rules to organize government. The Roman constitution was an unwritten set of principles and precedents that governed the way in which Rome was ruled. It outlined the powers and responsibilities of different government bodies and officials, and set rules for how decisions were made and disputes resolved.