Everyone tells me not to worry because she 's a big baby so she 's obviously getting enough to eat but I ' m her mother and it 's my job to worry . I ' m very good at my job . After dinner though , I let Charlotte walk around with me holding her to steady her . She 's gotten so good at taking steps recently .

Question: Why does the writer say she is very good at her job ?
Answer: None of the above choices .Because her baby is getting enough to eat .Because she has a big baby .Because she 's a good mother .