The government has used the Sherman Act to break up monopolies in which of the following industries?

A network externality occurs when

A) the usefulness of a good is affected by celebrities who use the good. B) there is production cost savings from being networked with buyers. C) the usefulness of a good is affected by how many other people use the good. D) there is production cost savings from being networked with suppliers.

Which of the following would shift the supply curve for a good to the left?

a. an increase in the price of that good b. a decrease in the price of an alternative good c. an improvement in technology for producing that good d. an increase in the cost of an important resource used to make that good e. an increase in the number of producers