Here's a problem to solve: A man ran on a treadmill for 1,800 seconds. At the end of his run, the treadmill indicated his energy output as 240,000 J. What average power did he generate?

Among the 4 following options, which is the correct answer?

- A: 666 W
 
- B: 133 W
 
- C: 66 W
 
- D: 7 W
 