Which Scenario Is an Example of Retroactive Interference

Multiple Choice

Which scenario is an example of retroactive interference?

A) The teacher finds it more difficult each year to learn and remember student names.
B) The ability to play the piano makes it difficult to learn and remember how to strike the keys on a harpsichord.
C) The student has learned a new locker combination,but can't remember the old one.
D) Since the move to a different city,it has been difficult to remember the new postal code.