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. Only Technician A is correct.
B. Neither of the two technicians is correct.
C. Both Technician A and Technician B are correct.
D. Both Technician B is correct