While in family therapy, a previously distant couple begins to communicate more frequently and intimately. At the beginning of therapy, the 13-year-old daughter used to sit close to her mother, frequently looking to the mother for reassurance and support and saying very little. Now, however, as the parents have become closer, the daughter has become openly hostile to and dismissive of the father. The daughter's change in behavior is best explained by the concept of:

A. Trangulation
b. Double binding.
c. Pseudo-hostility.
d. Enmeshment.
e. Transmuting internalization.

Answer: A. Trangulation