To What Does Gross Domestic Product (GDP) Refer

To what does gross domestic product (GDP) refer?

A) The difference in a given year between what the government raises in taxes and fees and what it spends
B) The value of all of the goods and services produced by an economy in one year
C) The total amount owed to those who have loaned money to the government
D) An increase in the revenue from the sale of U.S. Treasury bonds
E) The average value of goods and services produced in the United States