To adjust the width of table columns, you

Answer: Option D

To adjust the width of table columns in PowerPoint, you have two primary methods:

Option B: Drag the vertical gridline between two columns
This method allows you to manually adjust the width of a table column by clicking and dragging the vertical line between the columns to the desired width.

Option C: Drag the column markers on the table ruler bar
This method involves using the ruler bar that appears when you select the table. You can drag the markers on the ruler to adjust the width of the columns.

Both of these methods (Option D) are correct and can be used to adjust the width of table columns in PowerPoint effectively.