Two electronics technicians are looking at the testing instrument in the figure above. Technician A says that this instrument is used to measure electrical signals in a circuit and display them as waveforms on a screen. Technician B says that this instrument is called a signal generator. Which of the following statements is correct? A. Both Technician B is correct. B. Both Technician A and Technician B are correct. C. Only Technician A is correct. D. Neither of the two technicians is correct.