In Barley, Gibberellin Is Produced in the Embryo and

In barley, gibberellin is produced in the embryo and

A) directly breaks down endosperm starch into smaller molecules.
B) regulates the production of amylase there.
C) regulates production of abscisic acid in the endosperm.
D) moves to the aleurone layer where it suppresses gene transcription.
E) regulates production of amylase in the endosperm via GAMYB.