Final answer:
The correct keyboard shortcut to move the cursor to the start of the line on Windows is 'Home,' which is not listed among the options. The given choices are incorrect as they perform different actions like select all text, bold text, format text, or save the document.
Step-by-step explanation:
The keyboard shortcut that moves the cursor to the start of the line is not listed in the options provided. In most text editors and word processors on Windows, the correct shortcut to move the cursor to the start of the line is Home. On Mac, this action is typically achieved using Command + Left Arrow. Option a (Ctrl + A) selects all text, b (Ctrl + B) bolds text, c (Ctrl + E) centers text in some programs (or takes to end of line in others), and d (Ctrl + S) saves the current document.