Final answer:
The answer to the question is B. Discover, as it is not considered a standard, distinct step in the problem-solving process which typically includes Define, Prepare, Try, and Reflect.
Step-by-step explanation:
The option that is NOT considered a step in the problem-solving process is B. Discover. The problem-solving process generally includes steps such as Define the problem, Prepare by gathering information and resources, Try potential solutions, and Reflect on the results and processes used. The step 'Discover' is not typically listed as a distinct phase within the standard problem-solving model.
Key stages of this process involve identifying the 'given' information and what the problem is asking you to 'find'. Additionally, it is important to identify the unknowns in the problem. This could involve making a list of variables or aspects of the problem that are not immediately clear. 'Discover' might be an aspect of 'Prepare' where one might discover information, but it is not a formal step like Define, Prepare, or Try.