According to the Endosymbiotic Theory, infoldings in the cell membrane of an ancestral prokaryotic cell gave rise to endomembrane components, including the nucleus, endoplasmic reticulum and golgi apparatus in what would become eukaryotic cells. The evolution of endomembrane components provided for compartmentalization in eukaryotes, leading to more efficiency in cell processes. Which part of the endomembrane system provides a mechanism for transporting proteins from the rough ER to the golgi apparatus?
A) vesicle
B) lysosome
C) smooth ER
D) peroxisome