For the Left Graph, Rats Were Given a Shock When

Multiple Choice

For the left graph, rats were given a shock when they were placed in a specific environment. After they associated the shock with the environment, their hippocampus was removed at different intervals (7, 14, and 28 days after training) . What happened to the rats with hippocampal lesions, compared to controls?

A) The rats with hippocampal lesions learned the task faster.
B) The longer the investigators waited after training to lesion the hippocampus, the less the lesion effected fear memory.
C) The longer the investigators waited after training to lesion the hippocampus, the more of the task the rats forgot.
D) The rats that had hippocampal lesions 1 and 7 days after training were much more fearful, and therefore had a stronger association between the US and the CS, than control rats.
E) The control rats forgot the task, whereas rats with hippocampal lesions had better long-term memory.