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which best describes Marcus tone in this excerpt from littel brother

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 littel like am old women. I had done that to her. the terrorists had done that to her. the department of homeland security had done that to her.

A) remorseful
B) sarcastic
C) judgemental
D)thankfull