Which line from the text most clearly conveys the author's main focus? (10 points)
A.Lourdes loves him so much she cannot bring herself to say a word. She cannot carry his picture.
B.She will be gone for one year, less with luck, or she will bring her children to be with her.
C.He will become one of an estimated 48,000 children who enter the United States
D.Mexican rail workers have encountered 7-year-olds on their way to find their mothers.