单项选择题

Questions 6 to 7 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each of the two questions.
Now listen to the news.
According to Mr. Hildner, intense solar emissions

A.are dangerous to us on the surface of Earth.
B.are dangerous to airplane passengers.
C.can destiny satellites.
D.can destroy power networks.