<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 9-year-old boy is brought to the emergency room by his mother. She is concerned because her sons face has been swollen over the past 2 days. Upon further questioning, the boy reports having darker urine without dysuria. The boy was seen by his pediatrician 10 days prior to presentation with a crusty yellow sore on his right upper lip that has since resolved. His medical history is notable for juvenile idiopathic arthritis. His temperature is 99F 37.2C, blood pressure is 14090 mmHg, pulse is 95min, and respirations are 18min. On exam, he has mild periorbital edema. Serological findings are shown below:C2: NormalC3: DecreasedC4: NormalCH50: DecreasedAdditional workup is pending. This patient most likely has a condition caused by which of the following?? A: Antigen-antibody complex deposition, B: Effector T cell sensitization and activation, C: IgE-mediated complement activation, D: IgM-mediated complement activation targeting antigens on the cellular surface, E: IgG-mediated complement activation targeting antigens on the cellular surface,  <response>: This is a clinical vignette describing a 9-year-old boy with a recent history of a facial rash who now presents with facial swelling and dark urine. The serological findings show normal C2 and C4 levels but decreased C3 and CH50 levels. The recent history of a facial rash along with arthritis suggests this patient may have an underlying autoimmune or rheumatologic disorder. The facial swelling, dark urine and serological findings point towards a diagnosis involving complement activation and immune complex deposition. The normal C2 and C4 with decreased C3 and CH50 indicates activation and consumption of C3 via the classical complement pathway. This pattern is classic for immune complex mediated diseases such as systemic lupus erythematosus. Of the answer choices, choice A Antigen-antibody complex deposition best fits with the clinical presentation and serological findings in this vignette.A: Antigen-antibody complex deposition 