Select the most appropriate meaning of the highlighted idiom.
Cissy promised to turn over a new leaf and keep her room clean from now on.

Correct option is B

Option (b) is the correct meaning of the given idiom.
Idiom: Turn over a new leaf.
Meaning: To change one’s behavior for the better or start afresh, often by adopting good habits.
Example: After being late to class several times, he decided to turn over a new leaf.
Other related idioms and their meanings:
· “Mend one’s ways” – to reform.
· “Start from scratch” – to begin again.
· “Clean the slate” – to forget past mistakes and start anew.