Concept:The one-party system is often viewed as a means of uniting diverse groups within a single political framework.
Explanation:In a multi-ethnic or deeply divided society, multiple parties may encourage sectionalism and rivalry.
A single party can bring different ethnic, religious, or regional groups together under one broad movement.
This reduces political competition along sectional lines and fosters a shared sense of national identity.
Therefore, its major theoretical advantage is promoting national integration rather than eliminating all conflicts or guaranteeing social justice.
Answer:C. serves as an instrument of national integration