听下面一段独白，回答以下小题。
【小题1】What’s the main topic of the talk?

A．A famous singer and actor.

B．The music of rock and roll.

C．Many famous people around the world.

【小题2】How long was Elvis’s music career?

A．For about thirty years.

B．For about twenty years.

C．For about fifty years.

【小题3】Why was Elvis extremely popular according to the speaker?

A．He wrote many songs himself.

B．He performed well in movies.

C．He had an energetic dance style on stage.