单项选择题

Questions 6 to 8 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question. Now listen to the news. According to the news, what did private companies do after they built new roads

A.Reduced charges for transporting farm products.
B.Required payment from vehicles that used their roads.
C.Made repairs to older roads.
D.Installed streetlights on roads connecting major cities.