Impressionism pastel

This is the strangest work... I only spend like an hour or so on it cause I was rushing... and my teacher told me "Judy you are finally understanding the impressionist way" or something like that... and she gave me an A- on my work! O.O I was shocked cause there are works like the Dreaming girl which I spend like 3-10 hours on it.. yet she only give me a B or even a C! And wow... I was so shocked with the grade...