Write a Balanced Chemical Equation Illustrating the Decomposition of Chile $\rarr$

Write a balanced chemical equation illustrating the decomposition of chile saltpeter to form sodium nitrite and oxygen gas.

A) 2NaNO₂(s) $\rarr$ 2NaNO₃(s) + O₂(g)
B) NaNO₃(s) $\rarr$ NaNO₂(s) + O₂(g)
C) 2NaNO₃(s) $\rarr$ 2NaNO₂(s) + O₂(g)
D) 3NaNO₂(s) $\rarr$ 3NaNO₃(s) + O₂(g)
E) None of the above