Which of Following Would Be Classified as A $\underline{\text{ chemical }}$

Multiple Choice

Which of following would be classified as a $\underline{\text{ chemical }}$ change?

A) the condensation of nitrogen gas
B) the dissolution of sugar in water
C) the melting of gold
D) the tarnishing of the surface of copper in the presence of oxygen
E) the transformation of solid carbon dioxide into gaseous carbon dioxide