In Answer to the Question, "When a Plant Grows, Where

In answer to the question, "When a plant grows, where does the material come from?" the ancient Greek philosopher Aristotle hypothesized by logic that all material came from the soil. Which of the following experimental tests might best prove Aristotle's hypothesis to be correct or incorrect?

A) Stop watering the plant to see if t he mass of the water contributes to the long term growth of the tree.
B) Grow the tree in a pot and measure the mass of the soil before and after the tree grows to a certain height.
C) Cover the tree with a black bag.
D) Aristotle was one of the greatest philosophers of all time; thus no test to any of his hypothesis is necessary.