Where are options to add a border around the outside of a chart found?

Design tab in the Chart Layout gallery

Format tab in the Shape Styles group

Layout tab in the Background group

Insert tab in the Format gallery

Format tab in the Shape Styles group

Explanation:

The border can be added around the chart which could be of various types including dashed, dotted or plane line.

The border can be added around the chart by moving the cursor over the shape styles section of the ribbon. This gives instant border around the chart and for customization, you can click the format tab below chart tools tab. Now click the Shape outline button. We can also select the style and size of the border.

Thus, the selected option is the correct answer.