Suppose That a 5-Month-Old Child Turns Away and Starts Crying

Suppose that a 5-month-old child turns away and starts crying when a stranger approaches his mother and him in a playground.How would this reaction be regarded by modern developmentalists?

A) as very unusual for a child this young
B) as evidence of a strong, secure attachment
C) as a typical but not universal response for a child of this age
D) as evidence of an insecure attachment bond