B. Reaction to life. At some point, everybody gets anxiety in their life. Sorry if it's wrong, I don't really know. I'm just going off experience
Can you reorganize or restate this question? I have no idea what question is being asked here.
Answer:
I would say A, because B says that a proper amount makes tasks harder, which won't make sense. C say too little sleep makes tasks easier, but too little sleep makes tasks harder. Lastly D is the same as B.
