I believe it would be the second option
        
             
        
        
        
D, notice how the first 3 answers are alike! They are all personal where as the 4th is more of a statement not made personally
        
             
        
        
        
Engineers will often use reverse-engineering to solve problems. For example, by taking things apart to determine an issue, finding a solution and then putting the object back together again. Engineers know how things work, and so they constantly analyse things and discover how they work.