Final answer:
To move one cell to the left in a table, the key combination to use is Shift+Tab. This is a common shortcut in applications like Word and Excel for navigating tables. The correct answer is b.
Step-by-step explanation:
To move one cell to the left in a table, you should use the key combination Shift+Tab.
This command works in most word processing and spreadsheet programs, such as Microsoft Word and Excel. When you are in a table and you press Shift+Tab, the cursor will move to the previous cell to the left, similar to how pressing Tab alone moves the cursor to the next cell to the right. Hence the correct option is b.