Answer:
Stirring the salt and water
Crushing the salt so the grains are smaller
Step-by-step explanation:
Another way that is not in the choices that would increase the rate of dissolving of a solute in the solvent is heating the solvent. This increases the kinetic energy of the particles hence increasing collision rates. This helps increase the dissolution of the solute.
Stirring helps break down the solute to smaller particles. Smaller particles have a larger surface area to volume ration on which collision with solvent molecule can occur hence faster dissolution.