Of all the inventions, ______ was probably the most important for civilization.

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

A．Edison was curious in nature
B．Edison's mother played an important role in his life
C．Edison is a great inventor because he is deaf
D．Edison could create new things in two weeks