Which of the Following Statements Would Keynes Be Most Likely

Which of the following statements would Keynes be most likely to agree with?

A) Saving is more responsive to changes in interest rates than to changes in income.
B) Say's law holds in both a barter and money economy.
C) The internal structure of the economy is not always competitive enough to allow prices to fall.
D) Investment is exclusively dependent upon the interest rate.
E) none of the above