Which of the Following Would Increase GDP

Multiple Choice

Which of the following would increase GDP?

A) More people walk to work rather than drive cars.
B) Consumers in rural areas switch from buying home heating oil to burning wood they collect on their own land.
C) Farm families grow more for themselves than for the market.
D) Neither the price nor the quantity of television sets changes,but the quality of sets improves.
E) The amount spent on vacuum cleaners does not change,but quality decreases so much that more is spent on their repair.