I hope you'll forgive me if this is a touchy subject. I come from a place of curiosity, caring, and extreme ignorance. I've asked a therapist friend, but she says she hasn't studied it yet.

What is the role of talk therapy? I can imagine three approaches:
a) Work with the alters individually to help with their individual problems.
b) Work as a kind of "marriage counsellor" to improve relations between alters.
c) Work to "integrate" the alters.