By saying that she had come full circle under the pine tree, the author meant that __________.(Unit 3)

A、she grew up with the love of her mother and then successfully raised up her sons with love
B、she knew she would never forget her mother and all the events happening there
C、she had told her mother about her marriage and then her son told her about his marriage
D、the pine tree grew up to be a big tree and some young pine trees were planted nearby