The correct answer is: D) Better quality of life.
The Human Development Index (HDI) is a composite statistic of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development. A higher HDI score generally indicates a better quality of life for citizens of a country.
Option A is incorrect because a higher HDI score indicates a higher standard of living, not a lower one.
Option B is incorrect because a higher HDI score indicates better access to essential services, not limited access.
Option C is incorrect because a higher HDI score indicates lower inequality, not higher inequality.
I hope this helps!