2H₂ + O₂ --> 2H₂O

Which statement correctly supports the argument that the illustrated chemical equation shown above violates the law of conservation of matter?

A. There are more oxygen atoms on the left side of the arrow than on the right side.
B. There are more hydrogen atoms on the left side of the arrow than on the right side.
C. There are more hydrogen atoms on the right side of the arrow than on the left side.
D. There are more oxygen atoms on the right side of the arrow than on the left side.