A thick tree ring indicates that the year was good for its growth with good feeding, enough water and sun. The thickness of the tree can suggest when the growing time was longer at the time of warmer times and when shorter with cooler times. With this explained, we can choose Warm year as the correct answer.
There is one word to describe the culture in the Middle Ages and that is barbaric. While some countries were better than others at maintaining order and the education of their society it was quite a rough time to exist when people had little to no rights.
