The correct answer is: The lines in the excerpt from act V of Romeo and Juliet show that Romeo feels guilty about having killed Juliet’s cousin Tybalt is.
<em>"How oft when men are at the point of death</em>
<em>Have they been merry! which their keepers call</em>
<em>A lightning before death: O, how may I</em>
<em>Call this a lightning? O my love! my wife!"</em>
