Choose all that apply. The earliest civilizations developed in the river valleys of:

the Nile River
the Yellow River
the Amazon River
the Tigris and Euphrates Rivers

Explanation:

I know that the Nile was a spot where early civilization. The Tigris & Euphrates  is known as the Cradle of Civilization.

I'm always happy to help :)

the answer is the ku klux klan

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.