The marginal utility curve is downward sloping

Which of the following is a component part of investment spending?

A) the purchase of a new microwave by a fast food restaurant B) the purchase of 500 shares of corporate stock C) the sale of 500 shares of corporate stock D) all of the above

Purchasing power parity is widely accepted as a better explainer of short-run changes in exchange rates than interest rate effects

a. True b. False Indicate whether the statement is true or false