
Answer:
b
Explanation:
Breakeven quantity are the number of  units produced and sold at which net income is zero
Breakeven quantity = fixed cost / price – variable cost per unit
Breakeven price = (fixed cost / quantity sold) + variable price per unit
A margin of safety (MoS) is a difference between actual/budgeted sales and  breakeven sales.
At breakeven point, margin of safety would be zero