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