Question

____ affects dissolution because dissolution takes place on the surface of a solute.
pressure
stirring/agitation
size of the solid
temperature

Explanation:

The surface - area to volume ratio of a solid solute affects dissolution as dissolution occurs at the surface. Smaller solid sizes mean more surface area exposed for dissolution. Pressure mainly affects gas - liquid solubility, stirring/agitation speeds up the process by distributing dissolved solute, and temperature affects the solubility and rate of dissolution in a different way than surface area.

Answer:

C. Size of the solid