Arrange the following stages and key developments of Vedic literature and society in chronological order, from earliest to latest:
A) Composition of the Rigveda
B) Emergence of the Brahmanas and the Aranyakas
C) The transition from pastoral to agrarian society
D) Compilation of the Upanishads
1
A, B, C, D
2
A,C,B,D
3
A,D,C,B
4
B,A,C,D