A society consists of three individuals: Sam, Tristan, and Ulyana. In terms of income and utility, Sam is currently best-off, Tristan ranks in the middle, and Ulyana is worst-off. Which of the following statements is correct? a. Libertarianism suggests that government policies should strive to improve Tristan's utility at the cost of Sam's utility. b. Liberalism suggests that government policies should strive to increase Ulyana's utility. c. Libertarianism suggests that government policies should strive to make Sam, Tristan, and Ulyana equally well off. d. Utilitarianism suggests that government policies should strive to maximize Ulyana's utility