Here's a problem to solve: A student is creating a model of a stream in a forested mountain watershed. Which of these features might be included in the model to show how the stream could overload with sediment?

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

- A: a cabin near the stream
 
- B: rocks in the middle of the stream
 
- C: acres of cleared forest above the stream
 
- D: grasses growing along the banks of the stream
 