Which of these diseases is transmitted to the human body through the tsetse fly?

Sleeping sickness (African trypanosomiasis) is transmitted by the tsetse fly, which is found only in rural Africa. The disease is caused by parasites of the Trypanosoma brucei species and can be fatal if untreated. Filariasis is transmitted by mosquitoes, smallpox is viral and spreads person-to-person, and anthrax is bacterial from infected animals or spores.