Final answer:
One type of white blood cell produces antibodies, while another type C) destroys infected cells. Hence, C) is correct.
Step-by-step explanation:
The function of one type of white blood cell is to produce antibodies, while the function of another type of white blood cell is to destroy infected cells.
The type of white blood cell that ingests microbes is called a phagocyte, which includes cells such as macrophages and neutrophils.
These cells engulf and destroy pathogens through a process called phagocytosis. Therefore, the correct answer is option (C) destroy infected cells.