To measure gender differences specifically in terms of wealth, health, and education, the most appropriate option from your list is the Gender Development Index (GDI).
The GDI takes into account the disparities between men and women in these three critical areas: health (as measured by life expectancy), education (as measured by expected years of schooling and mean years of schooling), and standard of living (measured by gross national income per capita).
Here's a brief overview of the other options for clarity:
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Consumer Price Index (CPI): This measures changes in the price level of a market basket of consumer goods and services and is not focused on gender differences.
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GINI coefficient: This measures income inequality within a population but does not specifically address gender disparities.
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Gross Domestic Product (GDP): This measures the total economic output of a country and is not focused on gender differences in wealth, health, or education.
Therefore, the Gender Development Index (GDI) is your best choice for analyzing gender differences in wealth, health, and education.
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