Answer:
a.) limits on time in office
Step-by-step explanation:
Romans had fear of officials gaining too much power - therefore they put limits on time in office to one year - and could veto each other on disagreement. They had a system of government similar to ours (but not in every way) to make sure one wasn't gaining too much power or leading unfairly or unjustly.
Therefore A is the correct answer
-kiniwih426