The correct option is D All of the above
Cloaca is the posterior opening that serves as the only opening for the intestinal, reproductive and urinary tracts of certain animal species. All amphibians, birds, reptiles and monotremes possess this orifice. The cloacal region is also often associated with a secretory organ, the cloacal gland, which has been implicated in the scent-marking behavior of some reptiles, amphibians, and monotremes.