| Referring to the sound-powered telephone circuit shown in illustration, what statement is true concerning the button on the handset as represented by the component labeled "A"? EL-0093 |
| A) The push-button is depressed for the purposes of listening and talking. |
| B) The push-button is depressed only for the purposes of listening, and it should be released for talking. |
| C) The push-button is depressed only for the purposes of conversing with multiple stations. For a conversation between two stations, it is not needed. |
| D) The push-button is depressed only for the purposes of talking, and it should be released for listening. |
