Arrange the following theories/models according to their chronological order of introduction:
- The Multiple-Nuclei Model
- The Sector Model
- The Concentric Zone Model
- The Rank-Size Model
1
2, 3, 1, 4
2
3, 2, 1, 4
3
3, 1, 2, 4
4
4, 1, 3, 2
Arrange the following theories/models according to their chronological order of introduction: