The answer is one mystery that still remains unsolved is why we yawn.
and another theory is that when you yawn it sends oxygen to the brain causing your body to be able to stay awake, hence when you are tired and need to stay awake you yawn a lot.
I would probably answer with B, because facial expressions would tell if the reader is pleased, annoyed, saddened, ect. by the content :)
The correct answer is (He thinks she is worried but optimistic about her husband’s health.)
