問題:You are a sales representative who routinely visits customers in their homes and places of business to present the latest products and take orders (where inventory is available).
  Which of the following technology tools will most directly enhance your effectiveness?
  A. Electronic Data Interchange (EDI)
  B. Asymmetric Digital Subscriber Line (ADSL) broadband
  C. Mobile communications
  D. Computer telephony integration
  答案:The correct answer is: Mobile communications
  Rationale:A mobile phone enables both colleagues and customers to reach you when you are out of the office. It also enables you to call the office eg to check inventory availability of items, place immediate orders and so on. (If you had a laptop, this would be even better: you could have direct connection with office systems.)
  The other three options all involve linked computer systems, so are not relevant.