Final answer:
A bar chart is preferable for displaying a data series with 10 categories because it remains clear and easy to interpret, unlike pie charts which can become cluttered with too many slices.
Step-by-step explanation:
When choosing the best chart type for displaying a data series with 10 categories, a bar chart is often a suitable choice. Although a pie chart can show how an overall group is divided, it becomes difficult to interpret when there are too many slices typically more than five to seven slices can make a pie chart cluttered and hard to read. A bar chart, on the other hand, offers a clear comparison across categories, even with a larger number of them. Column charts can also be effective, especially if you want to emphasize the magnitude of the values for each category. Line charts are less optimal for categorical data unless you are trying to show trends over time or among ordinal categories.