Which of the Following Best Explains Mark-Up Pricing

Multiple Choice

Which of the following best explains mark-up pricing? 

A)  A particular profit margin is added to some costs, including the cost of sales. 
B)  A particular profit margin is added to all costs, including the cost of sales. 
C)  A fixed percentage mark-up is added to the cost price. 
D)  A 5% profit margin is added to the cost of sales.