Here's a problem to solve: A student has built a model in which sheets of cork floating in a tub of water represent tectonic plates. To make the sheet representing an ocean plate more accurate in the model system, the student should

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

- A: cut several holes in it.
 
- B: attach small weights to it.
 
- C: cut it into a smaller shape.
 
- D: replace it with a thin sheet of copper.
 