Answer:
A: A new blood test makes it easier-and safer-to detect concussions. 
Explanation:
The main idea of the passage is A new blood test makes it easier—and safer—to detect concussions.
Notice the phrases question the use of and proposed an alternative way. They suggest that the main idea involves a possible solution to a problem. Here, the main idea is that the problem of detecting concussions without radiation could be solved by a simple blood test.
 
        
             
        
        
        
<span>They contribute to the rising action by revealing additional information about the characters of the Lebrun brothers.</span>
        
             
        
        
        
Answer:
Gee
Explanation:
The question is not complete 
 
        
             
        
        
        
Answer:
Monday and Thursday
Explanation:
Days of the week are all proper nouns
 
        
                    
             
        
        
        
Answer:
I am a native English speaker
Explanation: