Question

Which choice is a thought as to what may have contributed to the decline of the Indus Valley civilization? *
Cities were destroyed by raging fires.
Major sandstorms blanketed the cities, forcing people to leave.
The soil became too salty for crops to grow.
Egyptian soldiers conquered them.

Answer 1

Well it can't be D since the Indus Valley fall and the kingdom of Egyptian rule were in different time periods. Can there be more than one answer?

Answer 2

no

Answer 3

It's C