All but Which of the Following Is True? Once Confirmed,a

All but which of the following is true? Once confirmed,a Chapter 13 bankruptcy plan:

A) is binding on all creditors, whether they like it or not.
B) washes the debtor clean of all pre-petition debts except those provided for in the plan.
C) permanently discharges the debts provided for in the plan.
D) may be modified upon the request of the debtor, the trustee, or unsecured creditors if the debtor's circumstances change.