The basic idea of Adam Smith's "invisible hand" is that:

Group of answer choices

a. A free, competitive economy cannot allocate resources efficiently without government planning.

b. There is a force inherent in government with seeks to achieve social usefulness.

c. Population increase is an important determinant of a country's development.

d. The pursuit of private interests by individuals and firms can lead to socially desirable ends.

e. Dire poverty and income inequalities are inevitably a part of a free market.