Arrange the following environment meet according to their years of occurrences (oldest being first):
A. The Paris Agreement (COP 21)
B. Stockholm + 50
C. Earth Summit
D. United Nations Conference on the Human Environment in Stockholm
E. Rio + 20
Choose the correct answer from the options given below:
1
D, C, A, B, E
2
D, C, E, A, B
3
C, D, A, B, E
4
C, D, B, A, E