During a radiation inversion, wind machines

The correct answer is D. All of the above.

During a radiation inversion, the air near the ground is cooler than the air above it. This creates a layer of warm air that traps the cooler air below it. Wind machines can help to break up this inversion by bringing warm air down toward the surface and lifting cool, surface air to higher altitudes. This mixing of the air near the ground can help to improve air quality and reduce the risk of heat-related illnesses.

Here is a more detailed explanation of each option:

• Option A: Bring warm air down toward the surface. Wind machines can do this by creating a vortex of air that sucks in warm air from the ground and then pushes it back up into the atmosphere. This can help to break up the inversion layer and improve air quality.
• Option B: Lift cool, surface air to higher altitudes. Wind machines can do this by creating a column of rising air that draws in cool air from the surface. This can help to mix the air near the ground and improve air quality.
• Option C: Mix the air near the ground. Wind machines can do this by creating a vortex of air that mixes the air near the ground. This can help to improve air quality and reduce the risk of heat-related illnesses.