Gross domestic product (GDP) is the total amount or market worth of all finished products and services produced within the borders of a country in a given time period.
GDP is often estimated on an annual basis, but it is also measured quarterly. The government of the United States, for example, produces an annualized GDP assessment for each fiscal quarter as well as for the entire calendar year.
The various data sets included in this study are presented in real terms, which means that the data has been adjusted for price changes and is thus net of inflation.
Thus, Option D is correct about the factors of GDP.
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