Consider the following statements about the decline of the Harappan civilisation:
1. There was a noticeable disappearance of seals, weights, and writing from Late Harappan sites.
2. Settlements expanded into Gujarat, Haryana, and western Uttar Pradesh after 1900 BCE.
3. Overuse of the landscape and climatic changes are the only explanations for the decline.
4. The standardised weight system was replaced by the use of local weights.
Which of the above statements is/are correct?
1
1 and 2 only
2
1, 2 and 4 only
3
2 and 3 only
4
All of the above