a. a public good is multiple choice 1 nonrival but excludable. rival but nonexcludable. rival and excludable. nonrival and nonexcludable. b. public goods are not privately provided because multiple choice 2 when goods are nonexcludable, there is too much competition for firms to earn a profit. when goods are nonrival, there is too much competition for firms to earn a profit. when goods are nonexcludable, those purchasing the good could allow others the use without requiring compensation. when goods are nonrival, those purchasing the good could allow others the use without requiring compensation.