The purpose of miracle, mystery, and morality plays was primarily to

To make people understand easily about the Bible stories and the Church by giving them the visual act or play that had happened at that time. In the Middle Ages, it is being performed at church services or in the religious holidays done every year. They have lessons shared that are taught to us. They are also being used nowadays.

Hope this might help.

c. vivid language descriptions that create sensory images. am very sure thats the answer.