Take a look at the code below and carefully review the nested elements in this block along with the classes and ids used. The <div> with an id = "answer-set" encloses the four answer buttons to help with shuffling answers later on. We wouldn't want the correct answer to always be on top, would we? :) Also, notice the <div> with id = "feedback" that can be used to give a player feedback after answering.
Update your question screen HTML to match the code below.