Answer:
A. sudden breaking of rock as it releases potential energy
 
        
             
        
        
        
The correct answer is "select the best solution". After evaluating possible solutions, that is considering the advantages and degree of effectiveness of each solution, the following step is to choose the most suitable solution. The other option refers to previous steps in the creative problem solving process
 
        
                    
             
        
        
        
Answer:
Secondary Source 
Explanation:
the book is a primary source abd the review about the book is a secondary source
 
        
             
        
        
        
A,the right answer is Comma...