Potassium Chlorate (Used in Fireworks, Flares, and Safety Matches) Forms $\to$

Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO₃(s) $\to$ KCl(s) + O₂(g) [unbalanced]
How many grams of oxygen are formed when 26.4 g of potassium chlorate is heated?

A) 223 g
B) 99.1 g
C) 10.3 g
D) 6.86 g
E) 4.60 g