Bianca drove at 60 miles per hour for 1 1/2 hours. Collin drove 150 miles in 2 1/2 hours, and Dale drove 105 miles in 1 3/4 hours. Which statement about the driver's average speeds is true?
A.Bianca had the fastest average speed
B.Collin had the fastest average speed
C.Dale had the fastest average speed
