In Which of the Following Ways Do Plant Hormones Differ

In which of the following ways do plant hormones differ from hormones in animals?

A) Plant hormones may travel through the air as a gas.
B) Plant hormones function as only paracrine signals.
C) Plant hormones may be transported from the hormone producing cell to the responding cell through a vascular system.
D) Plant hormones typically travel from the hormone producing cell to an adjacent responding cell through gap junctions.