For any given quantity, the price on a demand curve represents the marginal buyer's willingness to pay

A fast-food company spends millions of dollars to develop and promote a new hamburger on their menu only to find that consumers won't buy it because they don't like the taste. From an economic perspective, the company should:

A. Keep the hamburger on the menu because they've spent so much money and time developing and promoting the product B. Spend more money to develop a more efficient way to cook the hamburger so it cooks in a shorter time C. Pull the hamburger off the menu and treat the development and promotion expenditures as a sunk cost D. Keep trying to sell the hamburger so that people who developed and promote it have a job with the company

The main reason for diversification for an investor is to:

A. lower transaction costs. B. take advantage of the fact that returns on assets are not perfectly correlated. C. take advantage of the fact that returns of assets are perfectly positively correlated. D. gain from the greater returns that come from greater risk.