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What coefficients would balance the following equation?
__Al + __O2 → __Al2O3

A- 2Al + 3O2 → 1Al2O3 B-2Al + 3O2 → 2Al2O3

C- 3Al + 3O2 → 2Al2O3 D- 4Al + 3O2 → 2Al2O3