Which of the Following Factors Accounts for the Fact That

Multiple Choice

Which of the following factors accounts for the fact that the passage of lymph through a lymph node is slowed down to allow time for cleansing action?

A) There are more afferent vessels than efferent vessels.
B) There are valves where the afferent vessels enter the node to regulate the flow of lymph.
C) Lymph nodes are located where flow is naturally slow because there is no pressure gradient.
D) There is no resistance to flow in the lymph nodes, consequently there is no pressure and rate of flow is reduced.