Questions 1 to 5 are based on the following conversation.

单项选择题A．The Internet file-sharing services have made the entertainment companies lose lots of money.B．The Internet file-sharing companies have led their customers to download copyright materials.C．The Internet file-sharing companies have download copyright materials themselves:D．The Internet file-sharing companies are recovering money by downloading copyright materials.

单项选择题The title that best expresses the ideas of this passage is ______.