5. Although patents are a they also provide A. collusive agreement; for free entry or new firms B. collusive agreement; an incentive for invention and innovation C. barrier to entry; for free entry of new firms D. barrier to entry; an incentive for invention and innovation 6. If a monopoly is selling its 100th unit of output for $42.00, its marginal revenue A. will also be $42.00 B. will be less than $42.00 C. will be greater than $42.00 D. none of the above Use the following graph to answer the next 3 questions. MC .40 .35 ATC 5.31 .30 D -25 MR 0 12 14 16 Q Packs of chewing gum in thousands