Yes you chose the right answer.
<span>The sentence beginning "There is within me (and with sadness I have watched it in others)..." is your answer. It shows that even though he loved Doodle, he did some things he regrets. He even sees this type of meanness in others and it makes him sad, which hints at his regret.</span>
I'm sure that it depends on the person. They would definitely say there's a difference. Some may care for it and some may hate it.
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