What sequence would a user need to follow to change chart a into chart b?

insert, chart, quick styles, select a line chart

insert, chart, quick styles, select a column chart

chart tools, design, change chart type, select a column chart

chart tools, design, change chart type, select a line chart

Either options C or D

You can change the chart type of the whole chart or for single data series in most 2-D charts to give the chart a different look. In 3D or bubble charts, you can only change the chart type of the whole chart. By following the steps in the answers above, you will be in a position to select available chart type like column chart or line chart.