Over the course of 40 years, Frank grew his company to six package shipping stores. With his retirement approaching and the increased competition, he decided to reduce the number of locations to two. Frank’s reduction of effort represents a

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.