Classify each of the following items as a public good, a private good, a natural monopoly good, or a common resource. Explain your answer. Question content area bottom Part 1 Measles vaccinations are a _______. A. public good because they are nonrival and nonexcludable B. private good because they are rival and excludable C. common resource because they are rival and nonexcludable D. natural monopoly good because they are nonrival and excludable