I'm having some trouble recalling what I've previously learned about the Battle of Gettysburg because

I've just read a new book offering new information on that Civil War battle. This sort of phenomenon is
referred to as _______ interference.
A. distractive
B. passive
C. retroactive

The phenomenon you are referring to, where new information interferes with the recall of previously learned information, is called retroactive interference. So the correct answer is C. retroactive.

The phenomenon you are referring to is called retroactive interference. Retroactive interference occurs when newly acquired information interferes with the ability to recall previously learned information. In this case, the new book you've read on the Battle of Gettysburg is causing interference with your ability to recall what you previously learned about the battle.

And your answer is?