The correct answer is C. Multivoting . The CSSBB source explains that multivoting is a popular method used to select the most important items from a previously generated list when there are too many items for a team to work on at one time . It specifically states that the purpose is to narrow the field to a few items worthy of immediate attention, after which the items with the fewest votes are eliminated.
That is exactly what the question is asking: an acceptable way to reduce the number of options before or during use of a solution selection matrix. Brainstorming is useful for generating options, not narrowing them. Affinity diagramming organizes ideas into groups, and process mapping documents process flow. Neither of those is primarily a tool for reducing a long options list to a smaller set for decision-making. Multivoting is widely used in Six Sigma team decision processes because it is simple, participative, and effective for screening alternatives. Therefore, the verified answer is C. Multivoting .
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