Which of the following is NOT a step in the decision-making process?

The correct answer is C, "Add your thoughts and input," because this phrase does not align with the formal steps typically outlined in the decision-making process. The decision-making process in marketing usually consists of several key stages: identifying the problem, generating alternatives, evaluating the options, implementing the decision, and finally, reviewing or monitoring the outcome.

While adding personal thoughts and input can be a valuable part of informal discussions and brainstorming sessions, it is not a standardized step in the decision-making framework. The other options represent concrete actions that are essential to making a well-informed decision; identifying the problem clarifies what needs to be addressed, generating alternatives allows for exploring different solutions, and implementing the decision ensures that the chosen course of action is executed. Therefore, "Add your thoughts and input" stands out as it lacks the formality and structure of the other recognized steps in the process.