The following chemical equation is not balanced. What must be done to the equation to make it balanced? 
A) Change the coefficients to: 2 for Al, 3 for CuO and 3 for Cu.
B) Change the subscripts of CuO to CuO3.
C) Add a molecule of AlO.
D) Change the state of matter in the reactants.
E) Change the subscripts of Al2O3 to be AlO.
Correct Answer:
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