Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
When did Edward display his talent as a speaker

A．It was about a little animal.
B．It took her 8 years to write.
C．It was adapted from a fairy tale.
D．It was about a little girl and her pet.

A．The history of radio broadcast.
B．The development of radio technology.
C．People who shaped the sounds of radio.
D．Americans in the development of radio.