Final answer:
To select a single worksheet cell for working, click it once. Double-clicking edits contents, right-clicking opens a menu and Ctrl+Click selects multiple cells.
Step-by-step explanation:
To select a single worksheet cell so you can work with it, the correct action would be c) Click the cell. Simply placing your pointer over the cell and left-clicking once will select it.
This action allows you to start entering data, apply formatting or perform other tasks with the chosen cell. Double-clicking a cell allows editing its contents directly right-clicking a cell brings up a context menu with various options and Ctrl+Click usually selects multiple cells or deselects individual cells within a selection in most spreadsheet software.