The Lymphatic System Normally Transports Approximately 2 to 2

The lymphatic system normally transports approximately 2 to 2.5 liters of fluid per day and 80 to 200 grams of protein back to the circulatory system. What structures filter the lymphatic fluid, and why?

A) The lymphocytes; they reduce the pressure in the lymphatic system to maintain homeostasis.
B) The macrophages; they remove foreign substances and reduce hydrostatic pressure.
C) The lymph nodes; they remove foreign substances and fight infection.
D) The lymph nodes; they remove foreign substances and reduce blood pressure.