What are the stages of attachment in sequence? ( )

A、Indiscriminateattachment-Discriminateattachment-Specificattachment-Formationofreciprocalrelationship;
B、Indiscriminateattachment-Discriminateattachment-Formationofreciprocalrelationship-Specificattachment;
C、Indiscriminateattachment-Specificattachment-Discriminateattachment-Formationofreciprocalrelationship;
D、Discriminateattachment-Indiscriminateattachment-Specificattachment-Formationofreciprocalrelationship