Alberto sanded a wooden floor with his electric sander at a constant rate. Suppose he sanded 40 1/2 square feet of floor in 3/5 hours. How large an area would he have sanded in 1 hour?

A. 48 3/5 square feet in 1 hour

B. 67 1/2 square feet in 1 hour

C. 76 1/2 square feet in 1 hour

D. 80 1/2 square feet in 1 hour