@LizD the key line in the passage supporting (B) is: "originality of vision is one of the fundamental qualities by which artistic, as opposed to purely aesthetic, accomplishment is measured." (39 - 41). In other words, a painting is more than just the visual appeal of the brushstrokes on the canvas. The historical circumstances surrounding the creation of the work are crucial. That's why Lessing believes even a forged that perfectly mimics the technique of an original painting should be viewed as inferior. I hope that helps!
