Which is the properly balanced equation that shows the synthesis of limewater, Ca(OH)2, from calcium oxide and water?

A.
CaO + H2O → Ca(OH)2

B.
Ca(OH)2 → CaO + 2H2O

C.
CaO + 2H2O → Ca(OH)2

D.
Ca(OH)2 → CaO + H2O