Question

Which are thought to have contributed to the decline of the Indus Valley civilization?

Choose all answers that are correct.

A.
The Indus River and its tributaries changed course.

B.
Cities were destroyed by raging fires.

C.
The soil became too salty for crops to grow.

D.
Major sandstorms blanketed the cities, forcing people to leave.

E.
People moved to more fertile regions of the subcontinent.