单选题：Questions 13—22·You wil1 hear five people talking about e．bu

Questions 13—22
·You wil1 hear five people talking about e．business in different areas．
·For each extract there are two tasks．For Task One，choose the areas from the listA～H．For Task Two，choose the benefits from the list A～H．
·You wilI hear the recording twice．
TASK ONE—AREAS
·For questions 13—17，match the extracts with the areas，listed A～H．
·For each extract，choose the area stated．
·Write one letter(A—H)next to the number of the extract．

请根据以上内容回答题：
回答听力第13题：_________。