Which of the Following Is an Accurate Statement About Real

Which of the following is an accurate statement about real national income?

A) It always equals nominal national income.
B) It changes by the same amount and in the same direction as does nominal national income.
C) It changes only when the underlying quantities of output change.
D) It refers to national income with no adjustment for changes in prices.
E) It refers to national wealth but is not an indicator of current production.