Aluminum Metal and Oxygen Gas Are Produced When Aluminum Oxide

Aluminum metal and oxygen gas are produced when aluminum oxide is heated at high temperature.Which statement concerning this chemical change is true?

A) Aluminum oxide is the product in this reaction.
B) This reaction is a combustion reaction.
C) Aluminum and oxygen are the reactants in this reaction.
D) This reaction is a decomposition reaction.
E) The chemical equation for this reaction is: AlO₂(s) → Al(s) + O₂(g) .