[2pt] 9. Based on the figure, which statement best explains shoot phototropism?  

(A) Auxin accumulates on the lit side, increasing cell division, causing bending(
(B) Auxin accumulates on the shaded side, increasing cell elongation, causing bending toward light. (
(C) Auxin accumulates on the lit side, increasing cell elongation, causing bending toward light. (
(D) Auxin is evenly distributed, and bending is caused mainly by cell division differences. (
(E) Auxin accumulates on the shaded side, decreasing cell elongation, causing bending.

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