Concept:The rate of dissolution depends on factors that increase the contact between solute and solvent molecules, such as temperature and surface area.Explanation:Higher temperature gives solvent molecules more kinetic energy. They move faster and collide more often with solute particles. This speeds up the dissolving process.Smaller solute particles or a powder have a larger total surface area. More solute molecules are exposed to the solvent at the same time. This also increases the rate of dissolution.Stirring (not given as an option) similarly increases contact. Pressure does not significantly affect the dissolution of a solid into a liquid. The weight of the solute does not influence how fast it dissolves.Answer:Temperature and surface area (options B and C).