Answer:
The correct answer is the option A: Margin of safety ratio.
Explanation:
To begin with, the name of "Margin of Safety", in the field of business and accounting, is refered to a ratio whose main purpose is to establish the point in where the company knows that it has to sale obligately due to the fact that at that point the company can be sure that they have covered the fixed costs of it and after that point every sale will became a profit for the company. So that is why that this ratio indicates the percentage of each sales dollar that is available to cover those costs.