In which of the following stages of creative problem solving does gathering information,defining the problem,generating alternatives,and examining all available information takes place?

A) Preparation
B) Verification
C) Incubation
D) Illumination

The preparation stage involves gathering information, defining the problem, generating alternatives, and examining all available information. Verification involves evaluating and testing potential solutions. Incubation involves setting the problem aside and letting the subconscious mind work on it. Illumination involves the moment of insight or inspiration when a solution becomes apparent.