Mickey Is About to Take His Psychology Final

Multiple Choice

Mickey is about to take his psychology final.Just before the exam,the person sitting next to Mickey asks him the name of the physiologist who worked on classical conditioning.Mickey suddenly realizes that he cannot quite remember the name,but he knows that it starts with a P and is two syllables long.Mickey is experiencing:

A) repression.
B) simple decay.
C) retrograde amnesia.
D) the tip-of-the-tongue phenomenon.