Correct Answer: To pass the critical stage

Solution : The correct solution is the third option.

Explanation : The idiom to turn the corner is a figurative expression that does not have a direct literal meaning. It is often used metaphorically to convey the idea of overcoming a difficult or critical situation and reaching a point where improvement or recovery is evident.

The correct meaning is to pass the critical stage. When someone or something turns the corner, it implies a positive change or progress, often after facing challenges or difficulties.

Therefore, the correct meaning of the idiom is, to pass the critical stage.