In Europe, contracts as a principle are put in writing, and written contracts are minutely drafted.

A．the vote recorder
B．the stock ticker
C．the light bulb
D．the motion picture camera

A．he became a telegraph operator, a newsboy, and then got his first patent
B．he became a newsboy, got his first patent, and then became a telegraph operator
C．he got a patent, became a telegraph operator, and then became a newsboy
D．he became a newsboy, a telegraph operator, and then got a patent