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

单项选择题The main idea of this passage is（）

A．Thomas Edison was always interested in science and inventions, and he invented many important things
B．Thomas Edison could not keep a job
C．Thomas Edison worked day and night on his experiments
D．deaf people make good inventors because they can focus without the distraction of spoken conversation

单项选择题Which of the following statements is in the right order for Thomas Edison（）

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.