【单选题】

{{B}}Passage OneQuestions 26 to 28 are based on the passage you have just hearD、{{/B}}

A、
A、person who is willing to help Mr. and Mrs. Smith make money.
B．
A、person who is licensed to buy and sell stock on the stock market.
C．
A、person who is familiar with stock market and all the companies.
D．
A、person who is the instructor on the stock market.