Here's a problem to solve: Students are learning about different types of waves. Which is the least likely way for the students to generate a wave?

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

- A: by tossing a ball in the air
 
- B: by shaking the ends of a rope
 
- C: by throwing a pebble into a pool of water
 
- D: by pulling on a coiled spring toy
 