article: Mary is a girl .She is a middle school student. She is thirteen. She is in Class Three, Grade Two.
  There is a big picture in Mary's bedroom. It's the picture of the family. Mary's mother is a teacher of Chinese .She is a very good teacher. Mary's father is a worker. There is a big red flower on his black coat. He is at work from Tuesday to Sunday.  Mary's brother is near her mother. He is a middle school student, too. He is fourteen .He is in Grade Three.
  Mary and her brother like books .They like school. They study hard. They are good students.
question: There is a red flower on   _   coat.
options: Mary's Mary's mother's Mary's brother's Mary's fathers