Answer: All the options given are correct.
Explanation:
Income inequality is the differences in income of people. It is the aim of every government to reduce income inequality in a country by taking appropriate measures such as the use of progressive tax, infrastructural provision etc.
There are different causes of income inequality in an economy. One of the causes is differences in people's ability. Some peolle are more talented than others e.g footballers and actors. As a result, they may earn higher income than others.
Also, one who works longer hours is likely to make more money than others who work for shorter hours. Some people might also get wealthy through luck.