What is the balanced form of the chemical equation shown below?
Ca(OH)2(aq) + Na2CO3(aq) CaCO3(s) + NaOH(aq)

A. Ca(OH)2(aq) + Na2CO3(aq) CaCO3(s) + 2NaOH(aq)
B. 2Ca(OH)2(aq) + Na2CO3(aq) 2CaCO3(s) + 2NaOH(aq)
C. CaOH(aq) + Na2CO3(aq) CaCO3(s) + Na2OH(aq)
D. Ca(OH)2(aq) + Na2CO3(aq) CaCO3(s) + NaOH(aq)