1,000v During rush hour on a particular highway, the flow rate, F, of cars per hour is F = 33-4 0.0212 , where v is the speed of the traffic in miles per hour. What speed will maximize the flow rate? Round your answer to the closest mile per hour. O A. 23 mi. /hr. O B. 29 mi. /hr. O C. 41 mi. /hr. D. 46 mi. /hr. O E. 73 mi. /hr