Arrange the events in order of land transport development:
1. Animals were used as beasts of burden
2. Invention of wheel, use of carts and wagons
3. railway line development and transport
4. Human beings as carriers
Choose the correct answer from the options given below:
1
D, A, B, C
2
A, D, B, C
3
D, B, A, C
4
A, D, C, B