Public Utility Regulator's Instructions to Use Price Discrimination or Block

Public utility regulator's instructions to use price discrimination or block pricing is designed to:

A) allow utilities increases in the quantity of output and the firm's profit.
B) limit the profits of a utility.
C) reduce all of the prices charged by a natural monopoly like a public utility.
D) allow for more service while reducing profit of a natural monopoly.
E) assure that profit will be only normal and increase the quantity of output.