Could you help me in solving this question, Doctor, as soon as possible, please, and thank you.

Which of the following statements about margin of safety is false? a. If only the fixed costs increase but the number of units sold and unit selling price and unit variable cost are all constant, the margin of safety decreases. O b. Margin of safety measures the difference between budgeted revenues and breakeven revenues. O c. If the variable cost per unit decreases but the number of units sold, unit selling price and total fixed cost are all constant, the margin of safety decreases. O d. none of the given answers is false. O e. If only the fixed costs decrease but the number of units sold and unit selling price and unit variable cost are all constant, the margin of safety increases