It looks to me like a badly worded question. Neither the basic DI nor the DI element of a Remote Indicating Gyro Compass erect to the local vertical. They both erect to aircraft horizontal, meaning the axis is horizontal. It wouldn't work if the axis was vertical. The electric RMI uses torque motors, the mechanical DI uses jets. As the question says "DI" I would have thought they wanted the "nozzle" answer but I see they want the "torque motor" answer.