Question

jesse would like to modify the table that he has inserted into a word document by making the first row a single header cell. which action should jesse do? merge split resize none of the above

Explanation:

In Word, merging cells combines multiple cells into one. To make the first row a single header cell (assuming it was multiple cells before), merging is the correct action. Splitting divides a cell, which is the opposite. Resizing changes dimensions, not cell count.

Answer:

Merge