In Python, when using a nested decision structure with if$-$elif$-$else statements, what happens when a condition in an elif block is met?

A$.$ The program executes all subsequent elif and else blocks after the true elif.

B$.$ The program goes back and re$-$evaluates the initial if condition.

C$.$ Only the code within the elif block that has the true condition is executed, then the program exits the nested structure.

D$.$ The program exits the entire nested structure immediately without checking any further conditions.