How Do Lymphatic Vessels Differ from Those of Either the Arterial

Multiple Choice

How do lymphatic vessels differ from those of either the arterial or the venous system?

A) They do not run together with either the arteries or the veins.
B) The internal valves of small to medium lymphatic vessels are spaced close enough to give the vessel the appearance of a string of beads.
C) They have fewer valves than do the veins.
D) They have thicker walls than veins, but less thick than those of the arteries.
E) They have visibly delineated tunics.