Which of the following statements is true about attachment security and later development?

A) Children with mixed histories of attachment and maternal sensitivity tend to be physically and cognitively delayed.
B) Children with disorganized/disoriented attachment tend to become securely attached to at least one caregiver by middle childhood.
C) Mounting evidence indicates that continuity of caregiving determines whether attachment security is linked to later development.
D) A secure father–child relationship is less important for long-term adjustment than a secure mother–child relationship.

C