Greatest income inequality via widest GDP share gap

Steps:

• Define extremes as the largest difference in GDP percentage between richest 20% and poorest 20%.
• For each country, subtract poorest 20%'s share from richest 20%'s share using table data.
• Compare differences: Ghana (45%), Nigeria (50%), Senegal (42%), South Africa (62%).
• Select country with maximum difference.

Why D is correct:

• South Africa's 62% gap aligns with Gini coefficient definition of inequality, measuring richest vs. poorest quintile disparity.

Why the others are wrong:

• Ghana: 45% gap is moderate, less extreme than D.
• Nigeria: 50% gap exceeds Senegal but trails D.
• Senegal: 42% gap is the smallest, indicating least inequality.

Final answer: D