Oxygen Can Be Prepared in the Lab by Heating Potassium $\rarr$

Oxygen can be prepared in the lab by heating potassium chlorate in the presence of a catalyst.The reaction is 2KClO₃ $\rarr$ 2KCl + 3O₂.How many moles of O₂ could be obtained from one mole of KClO₃?

A) 1.5
B) 3.0
C) 1.0
D) 2.0