Which of the following is an example of retroactive interference?
◦ Your teacher finds it harder each year to learn and remember student names.
◦ Your ability to play the piano makes it difficult to learn and remember how to strike the keys on a harpsichord.
◦ Now that you have learned your new locker combination, you can't remember the old one.
◦ Since you have moved, it has been difficult to remember your new ZIP code.