Cells contain smaller components called organelles that are necessary for a cell's survival. Organelle functions have often been compared to components of larger systems. What is the differences between the rough and smooth endoplasmic reticulum (ER) A. Rough ER breaks down toxic substances, and smooth ER only transports them out of the cell.

B. Rough ER can synthesize and package lipids for export , and smooth ER cannot .

C. Rough ER can produce ATP, and smooth ER cannot

D. Rough ER can synthesize and package proteins for export, and smooth ER cannot.​