A school coach just announced that by the end of the quarter, all students should run the 10 miles in less than 70 minutes. There are 15 students in the group. ? 6 of them ran 10 miles in 1 hour + 5 minutes ? 4 of them ran 10 miles in 1 hour + 3 minutes ? 2 of them ran 10 miles in 1 hour + 9 minutes ? 3 of them ran 10 miles in 1 hour and 10 minutes. How many students made the goal?

• A. 3
• B. 10
• C. D
• D. 12