Answer:
A. enter key
Step-by-step explanation:
Microsoft Excel is a spreadsheet application with rows and columns. Each individual cells is located with a combination of column and row.
Copying a cell or a group of cells to adjacent cells is just by dragging the bottom node of the highlighted cell. Sometimes or another way to do this, is to right click on the cell and select copy, then right click on the target cell and select paste. This procedure can be used for both adjacent and non adjacent cell.
For shortcut purposes, to paste entries copied from other non adjacent cells to the destination, select the destination cell and press the enter button.