Find the meaning of the following idiom :

To keep one's temper

remain calm despite being upset or angry

The correct meaning of the idiom "to keep one's temper" is to remain calm despite being upset or angry. The idiom is thought to have originated in the 16th century, when "temper" meant "mood" or "disposition." The phrase is often used to describe someone who is able to control their emotions, even when they are provoked.

The other options for the meaning of the idiom are incorrect. Gets angry quickly means to become angry easily. To preserve happiness means to keep oneself happy. None of the above is also incorrect, as the idiom does have a specific meaning.