Question EASA Drone License A2 - Flight performance and planning

223 - EASA Drone A2 License - If you are flying in a location with high magnetic interference (e.g., near an iron bridge), which flight mode is most likely to cause unpredictable, erratic movements?

Manual mode (all stabilization off)

ATTI mode (Attitude mode, relying only on barometer and gyro)

Acrobatic mode

GPS/Position mode (P-mode), because it relies heavily on the magnetometer (compass) to maintain heading and correct position drift