How could you insert a new row between rows 20 and 21?

a. right-click row 20's row number, and then click insert.
b. right-click a cell in row 20, and then click insert.
c. right-click row 21's row number, and then click insert.
d. right-click a cell in row 21, and then click insert.

If you want to add a new row in Microsoft Excel, you need to use the Insert Row function. However, if you want your row to be placed between two existing rows, the option you should choose is (C) Right-click row 21's row number, and then click Insert. If you right-click on row 20 instead, the new row would appear between row 19 and 20.