Question

Which did the early river valley civilizations have in common?

A.
The nearby rivers were good for farming but made trade difficult.

B.
They built cities along rivers that rarely flooded.

C.
Their rivers provided defensive barriers against invasion.

D.
Their rivers meant that they could irrigate their crops.

Answer 1

All these were close to rivers. Rivers helped cultivation and navigation. There was surplus production, trade and contact with civilisations around. These were examples of large body of people living together and their problems led to organisation of civic administration and specialisation of functions. In many of these there were flood problems causing partial destruction of total destruction leading to rebuilding of houses etc,

Answer 2

It could be D