<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 2-year-old boy presents with multiple skin abscesses caused by Staphylococcus aureus. Past medical history is significant for recurrent infections by the same organism. The nitroblue tetrazolium NBT test demonstrates an inability to kill microbes. Which of the following defect is most likely responsible for the findings in this patient?? A: Deficiency of CD40L on activated T cells, B: Tyrosine kinase deficiency blocking B cell maturation, C: Inability to generate the microbicidal respiratory burst, D: Inability to fuse lysosomes with phagosomes, E: MHC class II deficiency,  <response>: This is a question about identifying the most likely immunodeficiency disorder in a patient with recurrent Staphylococcus aureus skin infections. The key finding is that the NBT test shows an inability to kill microbes. The NBT test assesses the ability of phagocytes to undergo a respiratory burst and generate reactive oxygen species to kill ingested microorganisms. Therefore, the answer will be a condition that results in impaired respiratory burst in phagocytes.C: Inability to generate the microbicidal respiratory burst 