It depends on your teacher, it should be A. It could be B if that’s what your teacher wants but I would go with A.
B and C ANSWER...
B) they are only present on the endoplasmic leaflet of the cell
C) they are only present on the cytosolic leaflet of the cell
Answer:
Autacoids or "autocoids" are biological factors (molecules) which act like local hormones
They can use those recently discovered genes and insert them in another species (fruits and vegetables) using genetic ingeniery technics so they can speed up the cell division on them, and accordingly increase the production.