Which of the following can Ninhydrin's application methods include?

The application methods for Ninhydrin, a chemical commonly used in latent print analysis to develop fingerprints on porous surfaces, can include various techniques. Dipping involves immersing the item into a Ninhydrin solution, allowing for thorough coverage and interaction with any latent prints. Spraying provides a method for applying the chemical in a fine mist, which can be advantageous for delicate items that might be damaged by submerging. Brushing allows for precise application on surfaces where control over the amount applied is necessary. Since all these methods (dipping, spraying, and brushing) are valid ways to apply Ninhydrin, the conclusion that all mentioned methods are included is correct. Each method can be selected based on the specific characteristics of the evidence being examined and the desired results in the development of latent prints.