From the Research on Mental Imagery for the Positions of the Hands

From the research on mental imagery for the positions of the hands on a clock, we can conclude that

A) in this area, there is strong evidence for propositional codes.
B) so few people can construct this kind of mental image that we need to be concerned about the limits of imagery research.
C) people with high mental imagery ability perform this task faster than people with low mental imagery ability.
D) decisions about the shapes of images require much longer when the two images are very different than when they are very similar.