[单项选择]行政机关对于申请人提出的行政许可申请材料，若发现存在可以当场更正的错误，应当( )。
A. 退回申请材料
B. 允许申请人当场更正
C. 替申请人更正
D. 不予受理

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. 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