What are the two processing methods for nonporous surfaces mentioned?

The correct answer highlights the processing methods used to develop fingerprints on nonporous surfaces. In forensic science, each method has specific applications based on the nature of the surface and the conditions under which the evidence was collected.

The use of powder is common for developing latent fingerprints on nonporous surfaces. This method involves applying a fine powder that adheres to the oils and residues left by fingers, allowing for clear visualization of the print. The cream method, while less conventional, can also be utilized on certain surfaces to enhance the visibility of fingerprints through similar chemical interactions.

The other methods mentioned, such as fuming, which typically involves exposing surfaces to vapors of substances like cyanoacrylate (super glue), are effective on nonporous surfaces but were not paired in the correct answer choice. The options provided do offer valid processes; however, the selection of powder and cream is particularly noted for their applicability in field settings and their effectiveness in revealing prints.

In summary, the focus on powder and cream represents a clear understanding of standard fingerprint processing techniques employed during investigations involving nonporous materials.