The statement that best describes how the image reinforces the text is the one that reads as follows: "The image aids readers' understanding of key concepts".
Images are far more explanatory and descriptive. They show what the text tries to say in more graphic way, so the reader gets a clear idea. It is said that a picture is worth a thousand words. By putting together both the images and the text, the readers get the whole picture.
The correct answer for the question that is being presented above is this one: " It was a matter of public knowledge, they said, that after the conquest of King William, his Norman followers, elated by so great a victory, acknowledged no law but their own wicked pleasure, and not only despoiled the conquered Saxons of their lands and their goods, but invaded the honour of their wives and of their daughters with the most unbridled license."