I looked it up and asked around and the most common answer was comparison and contrast
<span>You see lots of pies in the first course and in the second course, meat and fish pies. To cook a turkey in a pie was not terribly uncommon. The colonists did not have butter and wheat flour to make crusts for pies and tarts. That’s right: No pumpkin pie! Hope this helped. :) <span>
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I believe that the answer is; D. Move the comma and place it after softly.
The sentence would look like this:
Geoffrey mumbled softly, "She could have fixed it. I know she could have."
Answer:
That it reminds the reader about that event/thing sevral times which could build up some type of suspence to the reader
