Regarding this array: Gross full-time earnings in all countries - social democratic, conservative and liberal - have increased over the last 20 years, however, the levels of income inequality are lower in social democratic countries. Select one: True or False?
a) True - Gross full-time earnings have increased in all countries, but income inequality is lower in social democratic countries
b) False - Gross full-time earnings have not increased in all countries over the last 20 years
c) False - Income inequality is higher in social democratic countries despite the increase in earnings
d) True - Income inequality has decreased in all countries over the last 20 years