1 is d
2 is c and please just ask one question at a time, its annoying to have a lot.
        
                    
             
        
        
        
Answer:
The carvings found spiraling the column depict the events of the Dacian Wars, which are incredibly accurate according to scholars. The carving and the gilded statue of the emperor on top serve to document the past, as a history book does, and also to commemorate a great time in Roman History.
 
        
             
        
        
        
Answer:
it might be at least more than 20 year
 
        
             
        
        
        
Answer:
Ricardo should use the polite document form to inform the customer.
Explanation:
Ricardo should use the polite form of document, which involves:
-Date
-A proper salutation (Dear Mr.)
-A polite language vocabulary in the content using connectors such as nevertheless, despite, however, etc.
-A proper enclosure (Yours sincerely, at your services...)
-Your signature