Answer:
Primary boycott
Explanation:
Primary boycott is a form of  organized protest that is being done by cutting the flow of consumers toward a certain company. This is aimed to eliminate company's income until they're willing to have a conversation with the protesters.
This can be done by forcing the members of the group to stop purchasing a certain product, influence the public to purchase the company's product, or in a certain capacity physically prevented the customers from entering the business establishment (such as chaining themselves up in the company's front door)
 
        
             
        
        
        
J.K. Rowling is the author of Harry Potter
(that's what she is known for)
hope this helps
        
                    
             
        
        
        
I’m pretty sure it’s the 2nd answer
        
                    
             
        
        
        
1. C:  she would not go to the choral concert.
Her not going to the concert caused her to fail the course and not be allowed to re-take it. The F and the inability to retake the course would be the effect. 
2. False
Many events can have more than one cause and more than one effect. Effects, especially, can be high in number because one cause can set off a chain of events that affect a lot of different people.