Desertification

Which of the following are the causes of Desertification?

  1. Animal Grazing 2. Tsunami
  2. Drought 4. Deforestation

Select the correct answer using the code given below:

A
2, 3 and 4
B
1, 3 and 4
C
1, 2 and 3
D
1, 2, 3 and 4