What Is the Adaptive Value of Attachment Processes,according to Evolutionary

What is the adaptive value of attachment processes,according to evolutionary theorists

A)  Children learn the social and emotional skills needed for survival and reproduction. 
B)  Attachment itself is not an adaptive process, but it is a by-product of other adaptive learning processes. 
C)  Parents ensure that their infants stay close to them at all times, which enhances survival. 
D)  Innate mechanisms ensure that parents and children cooperate.