SAT English Practice Question

The artist's painting is a complex work of art, it features a variety of colors and textures, and it uses a variety of techniques. She used a variety of brushes and paints to create the piece, and the painting itself is quite large. However, there are some critics who say that the painting is too busy and that it lacks a sense of unity. How does the artist achieve the complexity in the painting?

1. A.The painting is too busy and lacks a sense of unity, however, there are some critics who say.
2. B.However, some critics say that the painting is too busy and lacks a sense of unity.
3. C.However, the painting is too busy and lacks a sense of unity, say some critics.
4. D.Some critics, however, say that the painting is too busy and lacks a sense of unity.