About Traffic-jam behaviour and breakdowns: clearing space and getting yourself to safety: which statement is WRONG?

The book only requires that you make room for emergency services when there is no hard shoulder; a fixed left/right formation is not part of this teaching material.
The hazard lights go on when you come to a stop in the jam and go OFF again once the vehicles behind have slowed or noticed — not for the whole jam.
✓ In a traffic jam you may change lanes if another lane is clearly moving faster.
In a breakdown you do get out: on the right, wearing a safety vest, waiting behind the crash barrier. 'Stay in the car' applies to stationary traffic-jam traffic, not to a breakdown on or next to the hard shoulder.

Correct answer: In a traffic jam you may change lanes if another lane is clearly moving faster.

Explanation

The rule is: do not change lanes in a traffic jam, regardless of an apparently faster neighbouring lane

The book only requires that you make room for emergency services when there is no hard shoulder; a fixed left/right formation is not part of this teaching material
The hazard lights go on when you come to a stop in the jam and go OFF again once the vehicles behind have slowed or noticed — not for the whole jam
In a breakdown you do get out: on the right, wearing a safety vest, waiting behind the crash barrier. 'Stay in the car' applies to stationary traffic-jam traffic, not to a breakdown on or next to the hard shoulder