It's either A or B. I would go with B though.
Since you didn't provide the excerpt, I am going to assume that the answer you need is 'hearken'.
The right answer for the question that is being asked and shown above is that: "c. Slieght." The word that is spelled incorrectly because it violates the rules for ie versus ei words or exceptions to those rule is that <span>c. Slieght</span>
