Costs and cost behaviour — practice question

The fixed costs of a business rise, whereas all other revenues and costs stay unchanged. What happens if output does not change?

• Acontribution per unit decreases; break-even point per unit decreases; margin of safety per unit decreases
• Bcontribution per unit increases; break-even point per unit no change; margin of safety per unit increases
• Ccontribution per unit no change; break-even point per unit increases; margin of safety per unit decreases
• Dcontribution per unit no change; break-even point per unit increases; margin of safety per unit increases