@LiezellKlein ...
Normally, you would add answers using the "Add Another Answer" link at the bottom right corner of your question ... as shown in your attached screenshot. This is also detailed in:
How do I create a Multiple Dropdown quiz question? - Instructure Community (canvaslms.com)
But, for some reason, the area to add your answers isn't working right for me, either. I can add answers using the "Add Another Answer" link, but after I save the question and the quiz, when I return to edit that question again, my answers don't seem to be there. It seems to me there is some kind of bug with this question type that should probably be reported to Canvas Support. I would recommend that you do this ASAP so that Canvas engineers can take a look at this strange behavior.
How do I contact Canvas Support? - Instructure Community (canvaslms.com)
Please report back if/when you talk with Canvas Support so that we know the outcome of this conversation...thanks!