In the Studies of Long and Moran on the Effects

In the studies of Long and Moran on the effects of viewing an unambiguous figure:

A) Viewing time was irrelevant to the perception of subsequently viewed ambiguous versions of the figure
B) After long viewing periods, the percept of the ambiguous figure was the same as that of the previously viewed unambiguous figure
C) After long viewing periods, the percept of the ambiguous figure was the opposite to that of the previously viewed unambiguous figure
D) After short viewing periods, the percept of the ambiguous figure was the opposite to that of the previously viewed unambiguous figure