I am pretty sure the answer is yes, they do.
        
             
        
        
        
A. it is a survival reaction that helps us live when in dangerous situations 
the fight or flight instinct is triggered when scared/in danger. you choose whether to fight, or run away. 
you don’t think through options all the time with either running or fighting it. therefore, it’s A.
 
        
             
        
        
        
Ranges from 8 to 20 seconds
        
             
        
        
        
you wanna give us more to answer...... or no?