The correct option is B "She thought of Mycah again and her eyes filled with tears. Her fault, her fault, her fault. If she had never asked him to play at swords with her ... ."
Ellipsis is a punctuation mark consisting of three dots. It is used to show omission of words in the middle of sentence. It shows speaker has trailed off and left a sentence. Option C is the answer which has ellipses as the end of the sentence. Thus, option C is correct according to the rule.