Answer:
The answer is B:  variety in sentence structure and length.
Explanation:
To have good fluency the sentence structure has to vary(so it does not just repeat every time). The length of a sentence must be long enough to make a point, that's why b makes the most since out of all the options.  
 
        
                    
             
        
        
        
<span>Juliet blames herself for causing the trouble.</span>
        
             
        
        
        
Answer:
Its 
D. a change from outward events to the speaker's inner thoughts
 
        
                    
             
        
        
        
<span> A. Problem/solution
This paragraph starts by identifying the problem that NACA faced: they needed more computers. The solution is then described in detail. They ended up hiring women, and the paragraph goes on to show how and why the number of women and the racial diversity at NACA grew over the next ten years. </span>
        
             
        
        
        
Answer:
I'm struggling to carry *these* books to the library.
Explanation:
I hope this helps!!