Concept:The idiom "pull himself together" means to take control of one's emotions and become calm again.
Explanation:When someone is told to pull himself together, it usually follows a moment of anger, stress, or distress.
The expression suggests that he should stop letting emotions overpower him and should restore his normal composure.
It does not relate to secrecy or changing one's decision.
Instead, it focuses entirely on emotional self-management.
Thus, the advice given is to regain control over his feelings and actions.
Answer:C. control himself.