Standard of living assessed by GDP per capita and life expectancy

Steps:

• Identify primary indicators: real GDP per head measures economic output per person; life expectancy reflects health and quality of life.
• Compare GDP per head: B (170) lowest, A/D (190) tied, C (210) highest.
• Compare life expectancy: D (44) lowest, A (46) next, B/C (58) highest.
• Factor in population growth and density: D's high rates (4.2%, 89/km²) suggest resource strain worsening living conditions.

Why D is correct:

• Lowest life expectancy (44 years) signals poor healthcare access and overall quality of life, a core measure of standard of living per UN Human Development Index.

Why the others are wrong:

• A: Matches D's GDP but has higher life expectancy (46) and lower growth/density, indicating better conditions.
• B: Lower GDP (170) but double D's life expectancy (58), showing stronger health outcomes.
• C: Highest GDP (210) and life expectancy (58), reflecting superior living standards.

Final answer: D