Which may have been a reason for the decline of civilization in the indus valley? (a) major sandstorms destroyed the crops. (b) unrelenting wars destroyed the villages. (c) disease destroyed much of the population. (d) craftsmen and laborers could no longer make a living.

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the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.