A Student Mixes 4

A student mixes 4.0 g of KNO₃ with 5.0 mL of water at room temperature,and observes that most,but not all,of the KNO₃ has dissolved.Which statement concerning this solution is TRUE?

A) The solution is considered supersaturated,since no additional KNO₃ will dissolve.
B) The solution is considered unsaturated,since not all of the KNO₃ dissolved.
C) The solubility of KNO₃ in water has been exceeded.
D) KNO₃ is a water insoluble ionic compound.
E) In order to get the additional KNO₃ to dissolve,the student can add more solute.