Which best describes the body paragraphs of an informative essay about a turning point?

a) they familiarize readers with the turning point and set up the ideas that will be presented.

b)they establish the main point of the essay and tell readers what the writer’s position is.

c)they tie the essay together and tell readers what they have learned and should remember.

d)they give clear examples and offer supporting details about the turning point while citing sources.