Answer:
The correct answer is C. 
Step-by-step explanation:
I took the test
 
        
                    
             
        
        
        
Answer:
The answer would be the third option, segment AS
 
        
             
        
        
        
Hey there!
A state border is thousands of miles long (some of them). Meters would be too small of a measurement. Centimeters is even smaller. So the answer is B. Because this uses the least amount of numbers. 
I hope this helps!