The correct answer is: A and B.
The tab key is a keyboard key that is used to move the cursor across the screen. It can also be used to indent a paragraph.
When you press the tab key, the cursor will move to the next tab stop. The default tab stop is every 8 characters, but you can change this setting in your word processing program.
To indent a paragraph, press the tab key once at the beginning of the paragraph. This will create a tab stop at the beginning of the paragraph. Then, type the text of the paragraph. The text will be indented from the left margin.
You can also use the tab key to move the cursor down the screen. To do this, press and hold the shift key while you press the tab key. This will move the cursor down one line at a time.
I hope this helps!