Which of the following statements regarding contribution margin is correct? Question 6 Not yet answered Marked out of 1.00 P Flag question Select one: O a. Contribution margin is equivalent to revenue less cost of sales. O b. Reducing variable costs while maintaining the sales price will improve contribution margin. O c. A decline in total sales will reduce the contribution margin. O d. An increase in contribution margin will negatively affect net profit margin. PREVIOUS PAGE NEXT PAGE