Final answer:
The solution is classified as a saturated solution.
Step-by-step explanation:
The given solution, where 80 g of NaNO₃ are dissolved in 100 g of water at 10°C, would be classified as a saturated solution. This is because the maximum amount of NaNO₃ that can dissolve at 10°C in 100 g of water is less than or equal to 80 g, which is the amount of solute present. Therefore, the answer is A. Saturated.