Read the table. What does the middle column show?
The Human Development Index, 2011
What does the middle column show the names of the countries on the table

How long the residents are likely to live

Explanation:

Life expectancy, which is usually expressed in years, is the statistical average lifespans of expected for an individual in a population. This statistical measure is varies and could be dependent on several factors such as geographical area, ethnicity, gender, access to health care facilities, etc.

Life expectancy is said to be high in developed countries when compared to that of developing countries.

The middle column titled: "life expectancy" shows "how long the residents are likely to live" in years.

the answer is the last option or letter d)