Which description best matches a stratification system that is the most common and relatively open in modern societies?

• A. Slavery
• B. Estate
• C. Caste
• D. Class systems

Answer: (D)

The idea being tested is how societies structure status and mobility. A class system is the type most commonly found in modern societies and is described as relatively open because people can move between layers through education, training, and changes in occupation or income. This openness relies on achieved status—where position is gained by effort or opportunity—rather than being fixed by birth or ownership. In contrast, slavery, estate, and caste systems are much more rigid, with status tightly linked to birth, ownership, or inherited rules, leaving little room for upward movement. So, the description that fits best is a class system, reflecting its mix of hierarchy and potential mobility in contemporary settings.