White Blood Cells (WBCs)have the Unusual Ability of Being Able

White blood cells (WBCs) have the unusual ability of being able to migrate through capillary walls into the surrounding tissues;why is this ability important?

A) WBCs coordinate the assembly of complement molecules into functional units outside the circulatory system to minimize the potential for clot formation.
B) WBCs become the antibodies that target the multicellular parasites that are too large to fit within the vascular system.
C) The majority of infections begin in locations other than the circulatory system.
D) WBCs leave the circulatory system to collect and return the red blood cells that are lost from the capillary during the inflammatory process.