nIncorrect:
Jill had a fight at work and had to meet with her supervisor, Joan, about it. It made her mad.
nIncorrect:
Joan didn’t know which was to blame, Jill or her co-worker.
nCorrect:
Jill had a fight at work and had to meet with her supervisor, Joan, about it. The fight made Joan mad.
nCorrect:
Joan didn’t know who was to blame, Jill or her co-worker.
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