Once a Couple Finds a Healthy Balance Between Separateness and Togetherness

Once a couple finds a healthy balance between separateness and togetherness:

A) they must begin to work at the flexibility dimension of their relationship.
B) they are likely to find the balance difficult to maintain for very long.
C) they will have learned how to avoid the extremes of enmeshment and disengagement.
D) all of these