Question A To what extent is our response to stress affected by genetics? How

 
Question A
To what extent is our response to stress affected by genetics? How

 
Question A
To what extent is our response to stress affected by genetics? How can individuals better cope with stress? Remember to explain and cite educational sources to support the ideas within the post.
Question B
There are people who argue we cannot fully experience happiness without fully experiencing unhappiness. Do psychologists agree or disagree? Why?