Which of the Following Statements Concerning Markets Is False

Which of the following statements concerning markets is false?

A) Buyers and sellers communicate with each other directly or indirectly about the quality and quantity of the product.
B) Buyers and sellers discuss, either face to face or through an agent or broker, what they are willing to pay and receive for a good or service.
C) Black markets deal with exchanges that violate the law.
D) Markets are always formally organized, like the stock market.
E) Underground market is the term given to unrecorded transactions, whether legal or illegal.