Right choice is (a) Musca domestica
To explain I would say: Musca domestica (Housefly) (Species: Domestica; Genus: Musca); Eurycotis floridana (Spider) (Species: Floridana; Genus: Eurycotis); Oryctolagus cuniculus (Rabbit) (Species: Cuniculus; Genus: Oryctolagus); Anopheles albimanus (Mosquito) (Species: Albimanus; Genus: Anopheles).