The following payoff matrix shows the outcomes for the United States and Russia from relying on conventional weapons versus atomic weapons in a military conflict. The percentages refer to the fraction of the population that would die. Russia Russia Atomic Weapons Conventional Weapons US Atomic Weapons In the US, 60% die In Russia, 60% die In the US, 5% die In Russia, 90% die US Conventional Weapons In the US, 90% die In Russia, 5% die In the US, 10% die In Russia, 10% die This situation above illustrates a positional externality because Select one: a. no matter what kind of weapons each country chooses, many people will die. b. using atomic weapons improves each country's outcome but hurts the other country. c. using atomic weapons is a dominated strategy. d. the game does not have a Nash equilibrium