Which of the following statements is true about the illustrated circuit? EL-0030 A. The field rheostat is used for manual voltage control. B. if the generator is flat compounded then the field rheostat needs to be adjusted up at full load to compensate for excessive voltage droop. C. this is a direct current elevator control with the lower and raise corresponding with the direction that the elevator will travel. D. the motor will tend to act like a series motor and overspeed with the controller in the full raise position.