At home,Mary's mother will ask her____.A.what she did at school B.where she was C.who is her teach

At home,Mary's mother will ask her____.A.what she did at school B.where she was C.who is her teach
Mary is seven.She can go to school.It is the first day at school.Her teachers are very good.The other children are very friendly.She likes the school very much.After school,she goes home with the other children.The next day,she doesn't go home with the other children.She asks a question to the teacher,Miss Brown."What did I do at school today?""Why do you ask me the question?"Miss Brown asks her."Because my mother will ask me the question at home."
At home,Mary's mother will ask her____.A.what she did at school B.where she was C.who is her teacher