Which Kind of Sound Contrast Differs Along the Sound Dimension

Multiple Choice

Which kind of sound contrast differs along the sound dimension that is called "manner of articulation"?

A) Whether air is closed off between the two lips or near the glottis
B) Whether flow is completely stopped or is only partially constricted by a narrowed passage somewhere in the vocal apparatus
C) Whether or not the vocal folds vibrate
D) A contrast caused by the relative height of the tongue during sound production