Here's a problem to solve: In a rubber duck race, the winning duck traveled 300 meters in 10 minutes. What was the duck's average speed?

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

- A: 0.5 m/s
 
- B: 1.0 m/s
 
- C: 7.5 m/s
 
- D: 30 m/s
 