Suppose that Fender is trying to practice indirect price discrimination through versioning. It plans to offer the cheaper American Standard version of its guitar for consumers who are highly price-sensitive and the more expensive American Deluxe version to those who are not. To be incentive-compatible Fender should charge for the American Standard and for the American Deluxe.

Which (if any) of the following scenarios is the result of a natural monopoly? instructions: you may select more than one answer. a. patent holders of genetically modified seeds are permitted to sue farmers who save seeds from one planting season to the next. b. doctors in the united states are prohibited from practicing without a medical license. c. there is one train operator with service from baltimore to philadelphia. d. coal is used as the primary energy in a country with abundant coal deposits.