Oxygen Gas Can Be Prepared in the Laboratory by Heating

Oxygen gas can be prepared in the laboratory by heating potassium chlorate, so that it decomposes according to the equation: 2KClO₃(s) → 2KCl(s) + 3O₂(g)
What would the pressure of O₂ be in a 2.00 L glass container at 23.5^oC if 5.75 g of KClO₃ is decomposed?

A) 0.0704 atm
B) 0.571 atm
C) 0.857 atm
D) 0.381 atm
E) 0.0651 atm