The correct answer is C. To prevent one person from having too much power
Explanation
During the time of the Roman Republic around the year 509 a. C, the position of the king was replaced by two magistrates who were called consuls. This position was occupied by a couple of consuls to avoid the abuses of power as the old kings had done. Therefore, a series of measures limiting the power of the new officers was established, within which it was established that each one had a veto over the decisions of the other. So the correct answer is C. To prevent one person from having too much power.
