What is meaning of the idiom To turn over a new leaf

A. To cover up one’s fault by wearing new marks

B. To change the o1d habits and adopt new ones

C. To change completely one’s course of action
D. To shift attention to new problems after having studied the old ones thoroughly

Occurrence: PPSC - NAIB TEHSILDAR (ENGLISH) (BS 14) - REVENUE DEPARTMENT PUNJAB - 2022