In the middle ages, stained glass windows were often used in churches. known by its beauty people used them to decorate their homes and building. Each window had a picture that told a story from the bible people who could not read or write could now learn about the bible. so B.teach people would be the right answer :))
Stained glass windows were once used to educate people who could not read. By looking at the painted scenes in the glass, people could learn about the stories of the Bible and religious teachings.
