Power-sharing refers to the distribution and allocation of power among different groups or individuals within a political system. It is an effective mechanism to manage conflicts and promote stability in diverse societies. The correct answer to the question is option 'C' - power-sharing helps to reduce the conflict between different groups. This can be explained in the following points:

1. Promotes Inclusivity: Power-sharing ensures that different groups have a say in decision-making processes. It gives representation and voice to various communities, ethnicities, religions, or other social divisions. By including all relevant stakeholders in the political process, power-sharing reduces the feeling of marginalization and exclusion, which can lead to conflict.

2. Prevents Dominance: Power-sharing prevents the domination of one group over others. In societies with diverse populations, it is common for certain groups to have more power and influence. This power imbalance can lead to resentment and conflict. By distributing power among different groups, power-sharing prevents the concentration of power in the hands of a few and creates a more balanced and equitable political system.

3. Accommodates Differences: Power-sharing recognizes and accommodates the differences that exist within a society. It acknowledges the diverse identities, interests, and aspirations of different groups and provides mechanisms for their peaceful coexistence. By ensuring that the interests of all groups are considered and protected, power-sharing reduces the likelihood of conflict arising from perceived injustices or grievances.

4. Encourages Cooperation: Power-sharing encourages cooperation and collaboration among different groups. When power is shared, groups are incentivized to work together and find common ground to address shared concerns. This collaborative approach fosters trust, understanding, and tolerance among groups, reducing the potential for conflict.

5. Enhances Stability: By reducing the conflict and ensuring the participation of all groups, power-sharing contributes to political stability. When different groups are included in decision-making processes and have a stake in the system, they are more likely to support and abide by the rules and institutions of governance. This stability helps to prevent the outbreak of violent conflicts and promotes social cohesion.

In summary, power-sharing is an effective strategy to reduce conflict between different groups. By promoting inclusivity, preventing dominance, accommodating differences, encouraging cooperation, and enhancing stability, power-sharing creates a conducive environment for peaceful coexistence and democratic governance.