Which of the Following Statements Is True

Which of the following statements is true?

A) Producer interests are diffused, while consumer interests are concentrated.
B) For public goods, the marginal cost of adding one more consumer is zero.
C) Different groups' support or opposition to any government law or regulation is, in most cases, based on people's beliefs in what is right and what is wrong.
D) The market for dental services is an example of a natural monopoly in most large urban areas in the US.
E) When dealing with problems created by natural monopolies, one of the approaches economists usually tend to favor is for government to take over the production of that good or service.