Compare and contrast the river valley civilizations

The earliest forms of civilizations were said to be located on the three river valleys of the Tigris-Euphrates River in ancient Mesopotamia, the Nile River in ancient Egypt and the Huang He and Indus River in ancient India and China. These three river valley civilizations had many differences yet still lived common life styles. Although the civilizations are located on different continents, they share similar social, political, and economic beliefs from their intellectual developments to types of government to religious beliefs and trading systems. When the civilizations were first invented, there was a lot of chaos and confusion. This led to the invention of the different forms of writing

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by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

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