It is a warning that indicates a future event. 
        
                    
             
        
        
        
Hello,
The answer is option A <span>Well, son, I’ll tell you:
Reason:
Commas, and punctuation requires a pause at the end which means the answer will be A because it has two commas which has a longer pause in the sentence which makes it the longest.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit</span>
        
             
        
        
        
Kathy found her job as a lawyer, challenging and very rewarding.