To answer this question, we need to understand the different keystrokes and their functions.
Option A) Ctrl + A - This option will move the cursor to the beginning of the current line, not the previous word.
Option B) Ctrl + B - This option will move the cursor back one character at a time, not to the beginning of the previous word.
Option C) Esc + B - This option is correct. This keystroke combination will move the cursor to the beginning of the previous word.
Option D) Ctrl + F - This option will move the cursor forward one character at a time, not to the beginning of the previous word.
Option E) Ctrl + E - This option will move the cursor to the end of the current line, not the beginning of the previous word.
The correct answer is Option C) Esc + B. This option is correct because it will move the cursor to the beginning of the previous word.