<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 34-year-old man comes to the physician because of progressive swelling of the left lower leg for 4 months. One year ago, he had an episode of intermittent fever and tender lymphadenopathy that occurred shortly after he returned from a trip to India and resolved spontaneously. Physical examination shows 4 nonpitting edema of the left lower leg. His leukocyte count is 8,000mm3 with 25 eosinophils. A blood smear obtained at night confirms the diagnosis. Treatment with diethylcarbamazine is initiated. Which of the following is the most likely route of transmission of the causal pathogen?? A: Deposition of larvae into the skin by a female black fly, B: Penetration of the skin by cercariae from contaminated fresh water, C: Deposition of thread-like larvae into the skin by a female mosquito, D: Penetration of the skin by hookworms in feces, E: Ingestion of encysted larvae in undercooked porkn,  <response>: This is a question about identifying the most likely route of transmission for a pathogen based on the clinical history and findings described. The key findings are progressive left lower leg edema for 4 months, prior episode of fever and lymphadenopathy after returning from India which resolved spontaneously, eosinophilia on CBC, and nocturnal blood smear confirming the diagnosis. This history is classic for lymphatic filariasis caused by Wuchereria bancrofti infection. The route of transmission is through deposition of larvae into the skin from the bite of an infected mosquito.C: Deposition of thread-like larvae into the skin by a female mosquito 