[单选题]绩效考核制度中，连续十二个月累计2次月度考评分低于（ ）分的,将解除劳动合同或退回劳务公司。
A.60
B.70
C.75
D.80

Thomas Alva Edison lit up the world with his invention of the electric light. Without him, the world might still be a dark place. However, the electric light was not his only invention. He also invented the phonograph(留声机), the motion picture camera, and over 1,200 other things. About every two weeks he created something new.
Thomas A. Edison was born in Milan, Ohio, on February 11, 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months. His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity(好奇) led him to start experimenting at a young age with electrical and mechanical things at home.
When he was 12 years old, he got his first job. He became a newsboy on a train that ran between Port Huron and Detroit. He set up a laboratory in a baggage car of the train so that he could continue his experiments in his spare time. Unfortun
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.