Given the fact "if some nutrients are in the soil then those nutrients are in the food chain", what is the answer to the question or completion "If the trees in an area are growing in soil rich with a certain vitamin, what might happen?"

Choose from:
(1). the vitamin would evaporate
(2). the vitamin would leak back into the ground
(3). the trees would mutate and die
(4). the squirrels would have that vitamin in their system
(4).