Answer:
The correct option is D: An 11-month-old girl may show anxiety when her mother goes into another room.
Explanation:
Option C is wrong because: A 5 month old baby will not develop fear of strangers and separation anxiety because it is between the age of 4 to 6 months that they begin to develop vision, which means that they may not have the ability to distinguish between their mother and strangers.
Option B is wrong because Young infants begin to experience distress and contentment even before they are 12 months.
Option A is wrong because at 12 weeks, which is 3 months, the baby still uses sound and not facial expression. Hence at, three months, a baby is more likely to smile to a sound from a person rather than in response to a smile.
The correct option is D: At 11 months, a baby's vision is clear and can differentiate between his parents and others, and at this point they begin to show some emotions like anxiety, fear and others.
