An automobile emissions testing center has three inspectors and tests 35 vehicles per hour. What should the service rate be in order to achieve a target utilization of 95 percent? 

A. More than 5 but less than or equal to 10 vehicles per hour 

B. More than 15 but less than or equal to 20 vehicles per hour 

C. More than 1 but less than or equal to 5 vehicles per hour 

D. More than 10 but less than or equal to 15 vehicles per hour