As the number of firms in an oligopoly ____, the oligopoly becomes more ____

Health insurance companies impose deductibles on policies and co-payments on claims

A) to reduce moral hazard problems. B) to increase prices. C) to increase sales. D) to reduces sunk costs.

Which of the following is correct?

a. Lenders sell bonds and borrowers buy them. b. Long-term bonds usually pay a lower interest rate than do short-term bonds because long-term bonds are riskier. c. The term junk bonds refers to bonds that have been resold many times. d. None of the above is correct.