One would add first names if there were multiple authors mentioned with the same surname. If there are many more authors one would add "et al." inside of the parentheses. If the name of the author is unknown then one would add the title of the work which is being cited.
Answer:
Sacrifice for a loved one is not always easy.
The ending or the final epiphany of the story.
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Answer:
A, E, B
Explanation:
So first you know that the athlete had to wait for his opponent. Then, you know that he didn't fight as much as the leading athlete, which gives us E and B.