Which of the following bar charts would be most appropriate for showing how a total...

A stacked bar chart is most appropriate when the purpose is to show how a total is divided into categories. Each bar represents the whole amount, and segments within the bar represent component categories. This makes stacked bar charts useful for software quality reporting, such as showing total defects by severity, total effort by activity, or total failures by root cause. A simple bar chart compares single values across categories but does not clearly show composition of a total. A grouped bar chart compares multiple related series side by side but is less direct for showing part-to-whole relationships. A horizontal bar chart is only an orientation choice. Because the question focuses on breakdown of a total, stacked is correct.

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