Shepard and Metzler Measured the Amount of Time It Took

Shepard and Metzler measured the amount of time it took for participants to come to a decision of same versus different as a function of the degrees of difference between the two figures in a pair.They found that:

A) reaction times were always equivalent, supporting the propositional view.
B) reaction times were inversely proportional to the weighting of each figure in visual memory.
C) the more the two figures were rotated away from each other, the more time it took participants to make their decisions.
D) same judgments were always faster than different judgments.