What Is the Difference Between the Myelinated and Unmyelinated Vagus

Multiple Choice

What is the difference between the myelinated and unmyelinated vagus?

A) The unmyelinated vagus sends slower signals because it is uninsulated
B) The unmyelinated vagus is thought to play a more important role in phylogenetically older behavior like freezing
C) The unmyelinated vagus is only found in primates, while the myelinated vagus is found in all vertebrates
D) Both A and B
E) All of the above