Which of the following describes a function of the endoplasmic reticulum within a cell

For the answer to the question above, one of the functions of endoplasmic reticulum within a cell is the facilitation of protein folding and the transport of synthesized proteins in sacs called cisternae. 
The endoplasmic reticulum contains many ribosomes where proteins are synthesized and this is called the rough endoplasmic reticulum. It is also involved in the packaging of proteins to be transferred out of the cell.
I hope this helps

Distillation.  distillation is the correct answer.