Final answer:
The Founding Fathers favored representative democracy because it prevented the concentration of power in one individual or group, mitigated the risks of corruption, and established checks and balances.
Step-by-step explanation:
The Founding Fathers believed that a representative democracy was a safer option because it prevented the concentration of power in a single individual or group. They were wary of the potential for corruption and abuse in other forms of government, such as in a monarchy, which could devolve into tyranny, or an aristocracy, which could lead to an oligarchy. Moreover, they were concerned that a direct democracy would be too susceptible to the whims of the masses, potentially leading to mobocracy or majority tyranny. Hence, the constitution created was a mixed form of government with checks and balances to prevent any one branch from becoming too powerful.
Answer (b) "It prevented the concentration of power in a single individual" is the reason why the Founding Fathers believed a representative democracy was safer since it provided a buffer against the problems of concentrated power. In contrast, (a) direct participation of all citizens, (c) favoring monarchy, and (d) excluding minority voices, were not considered safer options by the Founding Fathers.