Settlements developed in river valleys that were fertile for farming
The answer would be D, President Harry S. Truman pledged that the United States would help any nation resist communism in order to prevent its spread. His policy of containment is known as the Truman Doctrine
Despite not providing the picture, there is enough information in the question to understand that the correct answer is alternative A) "At least 500 Million Years"
If the fossilized being lived around 500 million years ago, it means that the rock must be at least about that age.
Alternatives B and C are inconclusive, since the rock might have formed before, and with the information presented it's impossible to tell it's exact age. We can only tell that it's at least 500 million years old because of the fossil of a specimen that lived about 500 million years ago.
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It is very important for consumers to carefully analyze the information being presented in advertisements. The reason for this is because advertisements tend to leave out the negatives in an advertisement since their goal is to persuade you into buying their product.
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