Benjamin is babysitting his brother's infant daughter when the doorbell rings. Benjamin opens the door and asks the delivery per
son to step inside. The woman does so and smiles at his niece. The little girl hides her face in Benjamin's shoulder and then looks back at the woman with concern. Benjamin's niece is approximately a. 3 weeks
b. 4 months
c. 9 months
d. 7 months
Benjamin infant niece hides her face as the stranger smile at her. The reaction is common at the age of 9 months because during this period a child gets to recognize people around him or her. She will be shy to unknown persons and hesitate to mix with them. In the same time, Benjamin niece looks back as the women after hiding her face in his shoulder because she is also curious about that person who is outside her family.
