The Golgi apparatus:

A. strings together amino acids to produce proteins.

B. is composed of stacks of membranous vesicles that are continuous with one another.

C. is the site of carbohydrate breakdown.

D. stores, modifies, and packages proteins.

D

Explanation:

1. The Golgi apparatus is also called as Golgi complex or Golgi bodies.

2. Golgi apparatus works as the cell's post office.

3. Functions of Golgi apparatus: it plays major function is the modifying, sorting and packaging of proteins for secretion, as proteins transport from ER to Golgi complex and in Golgi they further go modification.

- It is also functions in the transport of lipids around the cell.