Between Seven and Nine Months of Age, There Is a Shift

Between seven and nine months of age, there is a shift in the infant's social responses. In particular, infants

A) begin to show distinct preference for social interactions over nonsocial stimuli.
B) begin to show a positive response to individuals without any special preferences.
C) change from multiple attachments to one or two specific attachments.
D) start to become less anxious around strangers.