Hollis Industries produces flash drives for computers, which it sells for $$20$ each. Each flash drive costs $$13$ of variable costs to make. During April, $1,000$ drives were sold. Fixed costs for March were $$2$ per unit for a total of $$1,000$ for the month. What is the contribution margin ratio?

$$ A$)75\%$

B$)25\%$

C$)65\%$

D$)35\%$