| What is the purpose of the electronic regulator as shown in the illustration? |
| A) It receives an input from the control amplifier as well as the setpoint potentiometer and the output controls the reference anode current. |
| B) It receives an input from the control amplifier as well as the reference anode and the output controls the setpoint value. |
| C) It receives an input from the setpoint value potentiometer as well as the reference anode and the output controls the protective anode current via the control amplifier. |
| D) It receives an input from the setpoint potentiometer and the output controls both the reference anode current and the protective anode current. |
