Am pretty sure the answer is D
Answer:
You need your own style of learning. It took me a while to find mine. I was terrible at History, until I learned I was kinesthetic. I didn't learn by reading and writing, but by doing hands-on activities, games, writing songs, etc. Here is a snapshot explaining the types of learning styles. I hope this helps!
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.