Which of these is the most ideal measure of aggregate output?

A) Disposable income
B) Nominal GDP
C) Personal income
D) The real GDP
E) Gross national product

The real GDP is the most ideal measure of aggregate output because it accounts for changes in prices and adjusts for inflation, providing an accurate representation of the actual production output of a country over time. Disposable income, personal income, and gross national product do not directly measure aggregate output, while nominal GDP only measures the value of goods and services produced without accounting for changes in prices.