Question

diffusion of water vapor occurs fastest...
with none of these, because temperature does not affect the rate of diffusion.
over a hot stove where the temperature exceeds 100 degrees f.
at around 75 degrees f.
in a refrigerator.

Explanation:

Temperature affects the rate of diffusion. Higher temperatures increase the kinetic energy of particles, causing them to move faster and diffuse more quickly. A hot stove (temperature exceeds 100 degrees F) provides a higher - temperature environment compared to 75 degrees F or a refrigerator.

Answer:

over a hot stove where the temperature exceeds 100 degrees F.