Arrange the following events related to the development of political theory in education in chronological order:
1. Keynes’ development of welfare economics
2. The rise of critical theory based on Marxism
3. Emergence of Behaviouralism in the U.S.
4. Growth of liberal education during the European Enlightenment
1
4, 2, 1, 3
2
4, 3, 1, 2
3
3, 4, 2, 1
4
2, 3, 4, 1