One summer, bird watchers and zookeepers in a major city notice that more birds than usual are dying. At the same time reports of human encephalitis cases increase sharply. The cerebrospinal fluid of human patients is clear. Similar enveloped RNA virus particles are detected in samples from both birds and humans. Which of the following might be responsible for this outbreak?A) Neisseria meningitidisB) Cryptococcus neoformansC) coxsackie A virusD) an arbovirusE) rabies virus