The imaginary place in which all objects project to corresponding points in the left and right retina is

The imaginary place in which all objects project to corresponding points in the left and right retina is
A.thehoropterB.univariance planeC.constancy arcD.Air Force One
The depth cue of ___________ is most important in the Ponzo (railroad track) illusion.
A.perspective convergenceB.accommodationC.stereopsisD.motion parallax