In the state of Pennsylvania, of the energy industry permits customers to shop for and choose among several suppliers of electricity, rather than be served by only one provider.

The correct answer is letter "B": deregulation.

Explanation:

Deregulation is the withdrawal in a particular industry, market or economy of public control. It is introduced to create stronger competition within an industry. Once deregulation happens, it becomes easier to enter an industry which tends to enhance competition and innovation.

answer; complain or request hazard correction from your employer;