Here's a problem to solve: A student plans to design a new toothpaste tube that will give the same amount of toothpaste every time it is squeezed. Which should the student do first when designing the new tube?

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

- A: make a data table of amounts of toothpaste
 
- B: gather building materials
 
- C: create models of old toothpaste tubes
 
- D: draw a few possible solutions
 