Which of the Following Statements About Plant Embryos Is Correct

Which of the following statements about plant embryos is correct?

A) The suspensor forms from the shoot apical meristem before development of the root apical meristem.
B) The development of the shoot and root apical meristems is controlled independently.
C) The plant hormone abscisic acid is important in the development of the shoot-root axis.
D) The protoderm establishes the procambium tissue in the young plant embryo.
E) Apical meristems can increase the diameter of a stem provided the hormone levels are adequate at the time of germination.