Which of the following statements regarding phagocytes and phagocytosis is TRUE?

A)Macrophages,monocytes,and mast cells are phagocytes.
B)Contact of phagocytes with microbes stimulates the phagocytes to release chemicals that mediate the inflammatory response.
C)Phagocytosis is stimulated by the presence of proteins called rhodopsins.
D)Phagocytosis is the process by which leukocytes exit the bloodstream.
E)Phagocytosis is a process that only occurs within the bloodstream.