> A Moving to another question will save this response. Question 6 Which of the following is true about the free rider problem: O a. It typically arises in situations when the benefits of a good/service/product/technology are fully excludable O b. It is likely to occur in advertising when rival firms produce substitute goods O c. It typically results in the collectively efficient outcome for all agents O d. All of the above O e. None of the above Moving to another question will save this response