A mistake involving the misunderstanding or incorrect application of law with regard to an act or transaction. The defense of mistake of law raises two issues. The first issue occurs where, because of a mistake of law, the defendant did not have the requisite intent to commit a crime.
        
                    
             
        
        
        
Answer: an era in which artists created works using paint software such as Photoshop, without actually programming (Option B)
Explanation:  
Paint box was a starting to the digital era. It is the era where various artists used paint box for creating their artworks and graphics. In addition to that, to be able to do this, they would use software’s like Photoshop and not actually use programming in order to create their artworks.
 
        
                    
             
        
        
        
In art, theme is usually about life, society or human nature, but can be any other subject. Themes are the fundamental and often universal ideas explored in a work. Themes are usually implied rather than explicitly stated.
hope that hint helped❤