An example of would be if eric calls his new girlfriend by his old girlfriend's name. a. proactive interference b. retroactive interference** c. anterograde amnesia d. retrograde amnesia

I believe the answer is: retroactive interference
. retroactive interference refers to the occurence when new learned information is interfering with the past learned information.
This often cause the memory to interlap with one another which make Eric associate his current girlfriend with his old girlfriend's name.