Marti has a sore throat. His doctor suggests gargling with salt water to help reduce the pain. He heats water to 300 K and wonders how much salt he should add to avoid excess salt at the bottom of the cup. How much sodium chloride should Marti add? Did she create an unsaturated, saturated, or supersaturated solution?

a. 30g
b. 40g
c. 50g
d. 60g