<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 21-year-old woman comes to the physician because of a 1-week history of white discoloration of the tongue. She has had similar, recurrent episodes over the past 5 years. Examination shows white plaques on the tongue that easily scrape off and thick, cracked fingernails with white discoloration. KOH preparation of a tongue scraping shows budding yeasts with pseudohyphae. This patients condition is most likely caused by decreased activity of which of the following?? A: B cells, B: Complement C59, C: T cells, D: Complement C14, E: Neutrophils,  <response>: This is a clinical vignette describing a patient with recurrent oral thrush and onychomycosis, which are infections caused by Candida yeast. The question asks which part of the immune system likely has decreased activity to allow these recurrent fungal infections. Oral thrush and onychomycosis are often seen in immunocompromised patients, especially those with impaired cell-mediated immunity like HIVAIDS or those on immunosuppressive medications. Fungal infections are normally cleared by phagocytic cells like neutrophils and macrophages as well as T cells. Therefore, the decreased activity is most likely in T cells.C: T cells 