The Law of Constant Composition States That __________

The law of constant composition states that __________

A) compounds such as NO₂ and SO₂ have identical chemical properties.
B) for a given compound, the elements forming the compound always react in the same proportions.
C) nitrogen and oxygen can combine to form NO or NO₂.
D) elements do not always combine in the same proportion to give the same compound.
E) only one compound can be produced when two elements combine.