The tone of this passage can be best expressed as ______.

A．the relationships between the salesperson and the customer and the packaging of the product play a very important role in selling process
B．the first thing people should care about is quality
C．American company is wiser than German company
D．you can take any measure in order to promote sales

A．International trade fairs have no effect on conducting domestically business.
B．A U.S. trade show may involve s lot of looking but no buying.
C．You are not allowed to ask questions in the trade show of U.S. company.
D．A German exhibit is usually an open display.