The correct answer is: A. Sprayed after the aggregates are spread and compacted.
Penetration macadam is a type of road construction that uses a bitumen binder to coat aggregates. The bitumen is sprayed onto the aggregates after they have been spread and compacted. This helps to bind the aggregates together and create a strong, durable surface.
Option B is incorrect because the bitumen is not premixed with the aggregates. This would result in a weak and unstable surface.
Option C is incorrect because the bitumen is sprayed before the aggregates are spread and compacted. This would result in a surface that is not evenly coated with bitumen and would be more likely to crack and fail.
Option D is incorrect because it is not one of the possible answers.