One of the Experiments in Phototropism Involved Cutting Off the Tips

Multiple Choice

One of the experiments in phototropism involved cutting off the tips of grass seedlings before exposing them to light from one side.The decapitated seedlings did not bend toward light.A valid conclusion from this experiment would be that

A) light is perceived by the tip of grass plants.
B) plants cannot engage in photosynthesis without the tip of the plant.
C) hormones are produced in all parts of the plant.
D) a foil cover over the tip of the seedlings would cause them to bend.