Attachment theory posits that the prototypic experience of love is:

A) the result of cultural customs about romantic relationships.
B) the young child's bond with the primary caretaker.
C) a person's desire to be in a romantic relationship.
D) established by one's first romantic relationship.

Attachment theory proposes that the initial bond between a young child and their primary caregiver serves as the prototypic experience of love. This relationship creates a template for how individuals will approach future relationships and impacts their emotions, behaviors, and feelings of security in romantic partnerships. Cultural customs and personal experiences with romantic relationships can also shape individuals' perspectives on love but they are not the prototypic experience proposed by attachment theory.