Why Are Chromaffin Cells of the Adrenal Medulla a Good

Why are chromaffin cells of the adrenal medulla a good model for studying vesicle release?

A) Chromaffin cells release the same transmitter as the neuromuscular junction.
B) Chromaffin cells contain granules, which are organelles that are analogous to, and the same size as, synaptic vesicles. Therefore, studying granule release is the same as studying synaptic vesicle release.
C) Chromaffin cells contain granules, which are organelles that are analogous to, but much smaller, than synaptic vesicles. Exocytosis of these smaller granules is faster and therefore, easier to study.
D) Chromaffin cells contain granules, which are organelles that are analogous to, but much larger than, synaptic vesicles. Exocytosis of these larger granules is easier to study.
E) Chromaffin cells release transmitter in a nonquantal fashion, without the use of synaptic vesicles.