Which of the Following Is an Example of Proactive Interference

Multiple Choice

Which of the following is an example of proactive interference?

A) An experimenter tells you to remember "HIZNF," but then asks you to count backward by threes from 227. Twenty seconds later you cannot remember HIZNF.
B) You read a story but when you try to tell it you leave out several unimportant details and you distort some others.
C) You have changed your telephone number three times this year. As a result, you keep forgetting your new number.
D) You have had a new combination lock each of the last 3 years. As a result, you can no longer remember the combination you had 3 years ago.