What Are the Distinguishing Features of a Chapter 13 Plan

What are the distinguishing features of a Chapter 13 plan?

A) Each unsecured creditor must receive the same percentage of debt payments as the secured creditors.
B) In exchange for a longer bankruptcy term the debtor may keep more personal assets.
C) The debtor's assets are not liquidated, but disposable income is used to pay creditors for up to five years.
D) Chapter 13 plans may be filed every year, as necessary.