Information about British Economy Average GDP growth per year is______.

A．the type of work they do.
B．the place where they work.
C．the time they spend at work.
D．the amount of money they earn.

A．It made the work of professionals more enjoyable.
B．It made picture-taking suddenly popular among ordinary people.
C．It marked the beginning of manufacturing small cameras.
D．It met the need of photographers in America and Europe.