The idiomatic expression ‘pull yourself together’—

Correct answer: calm down by oneself

Explanation: ✅ Correct Answer: D) calm down by oneself 📚 Explanation: The idiom 'pull yourself together' is used to tell someone to regain their self-control or to become organized after an emotional upset. it means to stop being angry or sad and act normally again. This expression emphasizes the internal effort to reach a state of mental peace. It is a very common phrase used in situations where a person needs to find their composure quickly.