Final answer:
The power of consuls in the Roman Republic was limited by having them serve only one-year terms. This was to prevent power consolidation and to ensure that there was always a consul available to oversee affairs in Rome.
Step-by-step explanation:
In the Roman Republic, the power of consuls was limited in several ways to prevent any single individual from having too much control. One significant limitation was that consuls served for only one-year terms, which is option B from the selection given. This short term of service was designed to prevent the concentration of power and to encourage accountability and frequent turnover in leadership. Additionally, there were two consuls elected each year to keep each other's power in check and to ensure that one could be in Rome overseeing domestic affairs while the other was away, such as on a military campaign.