Which of the Following Statements About the Pricing of a Service

Which of the following statements about the pricing of a service is true?

A) Prices can be negotiated between a seller and buyer.
B) A price quotation that has been issued to a buyer represents the final price offered by the seller.
C) All service pricing is regulated by a government body that approves and rejects price increases.
D) The commission rates charged by competitors within an industry vary considerably.
E) Traditional or established service prices are virtually non-existent.