In some cells , there are two types of endoplasmic reticulums ( ER ) known as the smooth ER and the rough ER as seen in the image below . Many illustrations of a cell show various locations for organelles like the Mitochondria , Golgi apparatus , or Vacuoles however when drawing the rough ER , the location is always the same . How is the location of the rough ER related to its overall purpose for the cell ?

A)By being closely attached to the smooth ER the rough ER can easily sort , synthesize , and package lipids for the cell

B)The rough ER used as an extra layer of protection around the nucleus to prevent ribosomos from entering the nucleus

C)With ribosomes attached to its surface , the rough ER is near the nucleus which holds the instructions for making proteins

D)Being close to the nucleus helps the rough ER receive better direction on producing energy in the form of ATP for the cell