Which of the following statements is true?
a. a coupon bond is a debt security with only one payment.
b. the amount invested in financial security is referred to as perpetuity.
c. a coupon bond is a debt security that pays interest forever and never repays principal.
d. the present value of perpetuity varies directly with the annual repayments.

The year is 2278, and the starship enterprise is running low on dilithium crystals, which are used to regulate the matter-antimatter reactions that propel the ship across the universe. without the crystals, space-time travel is not possible. if there is only one known source of dilithium crystals, the necessary conditions for a monopoly are met. part 2 (1 point)see hint if the crystals are government owned or government regulated, and the government wants to create the greatest welfare for society, then it should set the price choose one or more: a. so only the rich can afford space-time travel. b. at the profit-maximizing price. c. at the efficient price. d. using the marginal-cost pricing rule. e. so everyone can afford space-time travel. f. at the monopoly price.