CaCO3 (s) + 176 KJ à CaO (s) + CO (g)

A. 176 KJ are released in an endothermic reaction.
B. 176 KJ are released in an exothermic reaction
​​​​​​C. 176 KJ are absorbed in an exothermic reaction.
D. 176 KJ are absorbed in an endothermic reaction.