[The Following Information Applies to the Questions Displayed Below

[The following information applies to the questions displayed below.]
Grand Gimmicks Company produces a single product with a current selling price of $170.Variable costs are $130 per unit,and fixed costs per month average $6,240.Management is considering increasing the selling price to $190 per unit.Assume that the variable cost per unit of the product and monthly fixed expenses will not change as a result of the proposed increase in selling price.
-At the current selling price of $170 per unit,the contribution margin ratio is approximately:

A) 23.5%.
B) 76.4%.
C) 34.7%.
D) 21.3%.