Riya visited her village after 10 years and found that there is a problem of desertification. What could be the probable reasons for this? (i) Overgrazing (ii) Indiscriminate cutting of trees (iii) Poorly drained irrigation systems

• A. (i) and (ii) only
• B. (ii) and (iii) only
• C. (i) and (iii) only
• D. (i), (ii) and (iii)