Well, from my experience, it would be prewriting. Prewriting is where you come up and brainstorm ideas. Its when you scribble ideas and write out a plan on the direction that you want your paper to head to, where you would write a list or draw a picture on key points you want to hit on the paper. 
        
                    
             
        
        
        
The correct answer is B) Have the neighbors eaten dinner yet? Because you can probably feel that sentence is the only one where correct tenses and agreement are used.
In A, it should be: Does Bailey have tickets to the concert?
In C, it should be: Are your parents coming to the baseball game?
        
             
        
        
        
It is important because the sources tell you whether the article was credible. When you have an article that has bad source, you are running the risk of having, wrong, opinionated data. This can discredit you paper if you use it.