The Facilities Needed to Conduct Over-The-Counter Market Transactions Include All

The facilities needed to conduct over-the-counter market transactions include all of the following except:

A) physical stock exchange to sell and buy stocks
B) securities dealers who make the market
C) brokers acting as agent to bring investors and dealers together
D) electronic networks that provide communication links between brokers and dealers.
E) all of the above are needed for over-the-counter market transactions.