Here's a problem to solve: Which best explains why the total mass of the product(s) would be less than the total weight of the reactant(s) after a chemical reaction?

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

- A: A physical change occurred.
 
- B: Atoms involved in the reaction lost mass.
 
- C: Precipitates were created in the new solution.
 
- D: Gases were released to the atmosphere.
 