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Select the line from the excerpt that shows a remorseful (sorry) tone?

Mom gave me a long hug, and I noticed how thin her arms had gotten, how saggy the skin on her neck was. I always thought of my mother as young, pale, rosy-cheeked and cheerful, peering shrewdly through her metal-rim glasses. Now she looked a little like an old woman. I had done that to her. The terrorists had done that to her. The Department of Homeland Security had done that to her.