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?