How does the norm height of a gas balloon with maximum differential pressure change, when its mass is reduced by 1%?

Question

Question Quiz BPL Gas - Balloon Pilot License - Principles of Flight (Balloon)

QuizVDS · Accepted Answer

Norm height increases by 80 m.

QuizVDS · Answer

Norm height increases by 800 m.

QuizVDS · Answer

Norm height decreases by 800 m.

QuizVDS · Answer

Norm height decreases by 80 m

Id 403 - BPL Gas - How does the norm height of a gas balloon with maximum differential pressure change, when its mass is reduced by 1%?