In an Experimental Investigation of the Retrograde Effects of ECS

In an experimental investigation of the retrograde effects of ECS on one-trial conditioning (Pinel, 1969) ,

A) amnesia was negligible if more than one ECS was administered.
B) amnesia was negligible unless five or more ECSs were administered at once.
C) retrograde amnesia for the conditioning was greater at longer conditioning-ECS intervals.
D) rats explored the niche during the test significantly less than did no-ECS control rats if they had received ECS 10 seconds, 1 minute, or 10 minutes after the conditioning trial.
E) rats explored the niche during the test significantly more than did no-ECS control rats if they had received ECS 10 seconds, 1 minute, or 10 minutes after the conditioning trial.