A 16-year-old asked a stranger at a grocery store to buy him and his mother some food in exchange for carrying the man's groceries to his car. (CET4) What had happened to this boy and his mother?
A、Maybe some happy stories had happened to them.
B、Maybe some sad and unfortunate stories had happened to them.
C、Maybe some exciting things had happened to them.
D、Maybe some lucky things had happened to them.