Why might Hogarth's painting in source C be difficult for audiences to understand does this take away from his message?

Well, honey, Hogarth's painting in source C might be a head-scratcher for some audiences because it's chock-full of symbolism and social commentary that can be as subtle as a sledgehammer. But hey, if folks can't wrap their heads around it, that's on them, not Hogarth. His message is still loud and clear, whether people get it or not.