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

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 class=