The Nurse Has Explained the Process of Phagocytosis to a Client

The nurse has explained the process of phagocytosis to a client with an infected wound.The client is fascinated by the nurse's description of cells that eat other cells and asks,Why don't they eat good cells,too?" How should the nurse respond?

A) They do,but there are not enough phagocytic cells to kill enough good cells to make a person sick."
B) The cells migrate to the infection before they start killing other cells."
C) They don't eat good cells because of a process called chemotaxis."
D) These cells can tell the difference between cells from the person's body and foreign cells."