Rough Endoplasmic Reticulum (RER)in the Cell Cytoplasm Is Intensely Stained

Rough endoplasmic reticulum (RER) in the cell cytoplasm is intensely stained by hematoxylin because hematoxylin:

A) Attaches to lipids in RER membranes
B) Binds readily to RNA
C) Catalyzes the precipitation of ribosomes into a dense,readily stained matrix
D) Is an acid dye and binds to acidophilic ribosomal proteins
E) Reacts with carbohydrate molecules of integral membrane proteins