The total amount of income earned by American resource suppliers in a year is measured by

A) Gross domestic product.
B) National income.
C) Personal income.
D) Disposable income.

National income measures the total amount of income earned by American resource suppliers in a year. Gross domestic product measures the total value of goods and services produced in a country in a year, which includes both income earned by resource suppliers and profits earned by businesses. Personal income measures the income received by individuals, and disposable income measures the income available after taxes and other deductions.