单选题根据下面的内容，回答题.


How did the nineteenth-century defenders of photography stress the photography?

A．It was a means of making people happy.
B．It was art for recording the world.
C．It was a device for observing the world impartially.
D．It was an art comparable to painting.

A．are struggling to establish photography as a fine art.
B．claim to be making works .of art by witnessing events.
C．proclaim that their works have nothing to do with art.
D．agree that photography is as worthy an art as painting.

A．objective.
B．mechanical.
C．superficial.
D．paradoxical.