An ordered list of chemical substances is shown.
 Chemical Substances
 1 CuO
 2 O2
 3 CO2
 4 NO2
 5 Fe
 6 H2O
 Which substances in the list can be some of the reactants and products in the same combustion reaction? (4 points)
 A. 1, 2, and 3
 B. 2, 3, and 6
 C. 1, 4, and 5
 D. 1, 2, and 5