Using the Harrod-Domar Growth Model,suppose One Economy Has to Maintain

Using the Harrod-Domar growth model,suppose one economy has to maintain a growth rate of GDP of 10 percent per year in order to avoid a decline in the average standard of living.Assume in this economy,the capital-output ratio v is 3 and the depreciation rate d is 5%,what is the required saving rate?

A) 5 percent.
B) 15 percent.
C) 30 percent.
D) 45 percent.