Question

which word processing feature saves you the most time keying in a document

Answer 1

If the question is multiple choice, you may want to list the options. Phrased the way it is now it's open ended and there's potential for very subjective answers. For example, I think that the keyboard saves you the most time keying in a document because doing it without one would take forever.

Answer 2

the answer is probably the option to use a mic to speak into and that automatically types for you.