Obvious but Unanswered Question on Phototropism
According to Wikipedia, "The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs. ... blah, blah, blah"
Is this because:
A. More auxin is destroyed on the light exposed side?
B. Less auxin is synthesized on the light exposed side?
C. Auxin migrates away from or not to the light exposed side?
D. None of the above.