A Researcher Is Growing a Single Plant in a "Clean

A researcher is growing a single plant in a "clean" greenhouse that lacks herbivores. She encloses one of the plant's leaves in a plastic box, and then introduces a caterpillar into this container. The caterpillar in the container is only able to feed on a single leaf of the plant. The researcher then compares the expression of jasmonic acid in different portions of the plant. What will she find?

A) Jasmonic acid will only be found in the leaf on which the caterpillar is feeding, as the caterpillar injects jasmonic acid into plant leaves to facilitate their digestion.
B) Jasmonic acid will only be found in the plant stem, but will be excluded from the phloem.
C) Jasmonic acid will only be present in leaves that are not actively being eaten by the caterpillar.
D) Jasmonic acid may be found anywhere in the plant, as it is transported throughout the plant vascular system (or in certain instances, the air) .
E) Jasmonic acid will not be found within this plant, as it is a signal that the plant produces and releases into the environment to attract caterpillar predators.