Which of the following is the best definition for "commodity? " a. an economic good or product b. a service performed by experts in the field c. a common economic issue d. a type of paper currency

The answer is A. An economic good or product

there are two main types of historical sources: primary sources and secondary sources. a primary source is something that originates from the past. it can be a chronicle, a piece of pottery, or even a piece of glacial ice that gives us climate data about the levels of atmospheric carbon one thousand years ago.

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