In which approximate direction does the centre of a non-occluded frontal depression move?

Question

Question ATPL - Airline Transport Pilot license - Meteorology

QuizVDS · Accepted Answer

In the direction of the warm sector isobars.

QuizVDS · Answer

In the direction of the sharpest pressure increase.

QuizVDS · Answer

In the direction of the isobars ahead of the warm front.

QuizVDS · Answer

In the direction of the isobars behind the cold front.

Id 622 - ATPL - In which approximate direction does the centre of a non-occluded frontal depression move?