Concept:Auto Fit resizes a column automatically so that the widest content is fully visible.
Explanation:To auto fit a column, hover the mouse pointer over the right border of the column header.
The pointer changes to a double-headed arrow (
↔).
Double-click the right border to instantly set the column width to fit the longest cell content.
Double-clicking the left border does not trigger auto fit; it only enables manual resizing from the left side.
Double-clicking the column header selects the entire column but does not auto fit the width.
Hence, the correct way to auto fit a column is to double-click the right border of its header.
Answer:Option A: Double click the right border of column.