What Do We Understand About the Presence of H₂O on Venus

What do we understand about the presence of H₂O on Venus?

A) There has probably never been a significant amount of water on Venus.
B) In the past, the atmosphere of Venus held significant amounts of water vapor, but it has always been too hot for liquid water to exist on the surface.
C) Oceans of liquid water once existed on the surface, but these evaporated and the water vapor was dissociated by ultraviolet radiation from the Sun.
D) Oceans of liquid water once existed, but this water is now locked up in various rocks on the surface.