Read the given paragraph carefully and answer following question.

The term development is generally used to describe the state of particular societies and the process of changes experienced by them. It is a multi-dimensioinal concept and signifies the positive, irreversible transformation of the economy, society and environment.

The concept of development is dynamic and has evolved during the second half of the 20th century. In the post World War II era, the concept of development was synonymous to economic growth which is measured in terms of temporal increase in gross national product and per capita income/capita consumption. Later in 1970's, redistribution of growth and equity were incorporated in the concept of development. By 1980s, it included improvement in social and material wellbeing of all in a society.

The notion of sustainable development emerged in the wake of general rise in the awareness of environmental issues in the late 1960s in the western world. The publication of "The Population Bomb' by Ehrlich (1968), Limits to Growth by Meadows (1972) and others further raised awareness which sets the scenario for the emergence of 'Sustainable Development'. The World Commission on Environment and Development gave its report (also known as Brundtland Report) entitled ‘Our Common Future’ in 1987 which defined sustainable development that takes care of ecological, social and economic development for present population and pleads for conservation to enable the future generations to use these resources.

Immediately after World War II era, the concept of development became synonymous with:

Increase in Gross National Product