Answer: Your right, all is correct
Explanation:
 
        
                    
             
        
        
        
The mother is the daughters parent
        
             
        
        
        
Intelligent, Wasn't that bright is sarcasm, like, Wow that was smart (aka stupid)
MAY BE WRONG, ALSO LEARNING MYSELF
 
        
                    
             
        
        
        
Answer:
It was a breakthrough in his research.
Explanation:
James Giblin's book "The Riddle of the Rosetta Stone" presents the perfect illustrations and descriptions of how ancient hieroglyphs were an important factor. Moreover, the book also presents an interesting overview of ancient Egyptian history for avid historians and even for children interested in archeology.
Based on the given statement, we can know that the <em>"copy of an inscription"</em> that was sent to him by a colleague became the breakthrough in his research. This piece of information helped Jean-Francois Champollion's research and became the breakthrough act that uncovered or revealed everything that's been hidden.
Thus, the correct answer is the first option.