You Are Using Vi to Edit a File in Insert

Multiple Choice

You are using vi to edit a file in insert mode. You try to use the BACKSPACE key to delete a word. The editor does not respond. Which of the following could be the cause?

A) You need to switch to normal mode.
B) You need to switch to replace mode.
C) You need to switch to command mode.
D) The BACKSPACE key does not work in the vi editor.