Which of the following statements regarding COP vesicle budding is false?
A. Both Sar1 and ARF undergo confirmational changes to insert into the ER or Golgi membranes in order to carry out their functions in vesicles
B. COPI and COPII vesicles are composed of completely distinct coat proteins
C. COPII vesicles travel from the endoplasmic reticulum to the cis-Golgi
D. Hydrolysis of GTP to GDP by Sar1 or ARF triggers assembly of the COP coat