At High Temperatures Limestone Decomposes According to Which Balanced Chemical $\to$

At high temperatures limestone decomposes according to which balanced chemical equation?

A) Ca(OH) ₂(s) $\to$ CaO(s) + H₂O(g)
B) 2 CaO(s) $\to$ 2 Ca(s) + O₂(g)
C) CaCO₃(s) $\to$ CaO(s) + CO₂(g)
D) Ca(OH) ₂(s) $\to$ CaH₂(s) + O₂(g)
E) 2 CaCO₃(s) $\to$ 2 Ca(s) + O₂(g) + CO₂(g)