WHICH OF THE FOLLOWING IS NOT MENTIONED AS A PROBLEM ENCOUNTERED B...

52. - DAP AN DE LUYEN THI DH TIENG ANH DAP AN DE LUYEN THI DH MON TIENG ANH NGAY 1142014
DAP AN DE LUYEN THI DH TIENG ANH DAP AN DE LUYEN THI DH MON TIENG ANH NGAY 1142014
52. Which of the following is NOT mentioned as a problem encountered by Morse in developing the telegraph? A. His coworkers laughed at him. B. The public was not interested in what he was doing. C. He suffered numerous mechanical problems. D. He did not have enough money.