| Which of the following statements describes the function of the device labeled "C" shown in the illustration? Illustration MO-0115 |
| A) The device is a relief valve with feedback to prevent excessive pressure from damaging system components. |
| B) The regulator, or pressure reducer, drops the supply pressure to the desired operating level. |
| C) The regulator reduces the pressure of the supply air to provide ancillary main engine services. |
| D) Constant pressure is maintained at device "B" while device "C" is used only to modify the output signal. |
