The correct answer to the Downward Inversion quiz is No, it is only an Inverted Stunt. The definition of a Downward Inversion is:
A stunt or pyramid in which an inverted person’s center of gravity is moving towards the performing surface.
In this stunt when the top person is inverted her center of gravity is not moving towards the performing surface therefor it is not a downward inversion. Had the top person been in a prep level inversion, dropped to waist level, then rotated to her feet the skill would be considered a downward inversion during the drop from prep to waist level.
This ruling and explanation are based on the 2016-17 version of the rules dated August 31, 2016.