Final answer:
After respiratory burst, neutrophils typically undergo programmed cell death (apoptosis) and are then cleared by other phagocytes.
Step-by-step explanation:
After respiratory burst, the most common fate of neutrophils is programmed cell death, also known as apoptosis. During a respiratory burst, neutrophils produce reactive oxygen species to kill pathogens, a process that can also lead to self-damage. Eventually, they die and are usually cleared by other phagocytes such as macrophages. Thus, the correct answer is D) Programmed cell death. Respiratory burst is a defense mechanism used by neutrophils to control infection through the rapid release of reactive oxygen species.