Plants Grow Toward the Light Because

Plants grow toward the light because:

A) auxin concentration on the shaded side increases.
B) stem elongation is greater on the side exposed to the light.
C) gibberellic acid concentration is greater on the side exposed to light.
D) cells on the shaded side divide more rapidly due to the presence of ethylene.
E) photoreceptive statoliths settle to the bottom of the cells on the shaded side.