Here's a problem to solve: A student dissolves 20 g of table salt in a glass of water. Which statement explains what happens to the weight of the table salt after it dissolves?

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

- A: The weight decreases because the pieces of table salt are much smaller.
 
- B: The weight increases because the table salt is spread throughout the water.
 
- C: The weight stays the same because the amount of table salt does not change.
 
- D: The weight is zero because the table salt has become a liquid.
 